Cardiologist Financial Planning: Employment Structure, PSLF, Cash Balance Plans, and Private Equity
Cardiology has become the second-highest-compensated medical specialty in the United States. In 2025, cardiologists averaged $575,000 in total compensation — up 10% from $520,000 the prior year, surpassing radiology and trailing only orthopedics at $611,000.1 That income is earned after one of the longest training pipelines in medicine: 4 years of medical school, 3 years of internal medicine residency, and 3 years of cardiovascular disease fellowship, with interventional cardiologists adding a fourth fellowship year and electrophysiologists adding up to two additional years beyond that.
The result is a physician who enters attending practice at age 33–36, typically carrying $200,000–$400,000 in student loan debt, compressed into 25–30 high-income earning years. Every major financial decision — how to handle student loans, how to structure retirement savings, how to evaluate a job offer — carries consequences that compound over decades.
But the most consequential variable isn't income. It's employment structure. Over 70% of cardiologists are now employed by hospitals or large health systems, and private equity consolidation has moved into cardiology with momentum that rivals what happened in radiology and emergency medicine five years ago.4 Where you work — and who employs you — determines whether PSLF is on the table, how much you can shelter from taxes each year, and whether your deferred compensation is protected or at risk. This guide covers those decisions in depth.
Cardiologist Income and Employment Landscape
Cardiology compensation has climbed dramatically. No other specialty saw larger percentage income growth in 2025 than cardiology — a 10% increase driven by strong demand for cardiovascular services and the competitive labor market created by PE consolidation bidding for physician talent.1 But compensation varies substantially by subspecialty and setting:
| Employment Setting | Approximate Income Range | Key Financial Characteristics |
|---|---|---|
| Academic medical center (direct hire) | $380K–$480K | Below-market pay; usually PSLF-eligible; research time; slower loan payoff unless forgiveness |
| Community hospital (direct hire, nonprofit) | $460K–$560K | Middle tier; PSLF-eligible if 501(c)(3); limited retirement flexibility vs private practice |
| PE-backed platform (e.g., CVAUSA, US Heart & Vascular) | $500K–$640K | For-profit employer; not PSLF-eligible; non-gov 457(b) creditor risk; rollover equity risk |
| Independent private cardiology group (partner) | $550K–$750K+ | No PSLF; full retirement flexibility; potential cath lab / ASC ownership; highest tax complexity |
| Interventional cardiologist (any setting) | $600K–$900K+ | Premium over non-invasive; higher malpractice class; stronger cash balance potential |
| Electrophysiologist (EP) | $600K–$850K+ | Device implants add procedural volume; similar structure to interventional cardiologists |
PSLF Eligibility for Cardiologists
PSLF requires 120 qualifying monthly payments while employed full-time at a qualifying employer: a federal, state, or local government entity, or a 501(c)(3) nonprofit. With over 70% of cardiologists now employed by hospitals or large health systems, a substantial fraction qualify — but the PE consolidation wave has created a growing group who do not.2
Who Qualifies
- Direct employment by an academic medical center or nonprofit hospital system: If your W-2 is issued by the nonprofit hospital or its 501(c)(3) parent, you qualify. Most university cardiology divisions and teaching hospital systems meet this test.
- VA and federal government cardiologists: All federal employment qualifies. VA cardiologists, including those in telehealth roles, are federal employees with clear PSLF eligibility.
- Nonprofit health system community hospitals: Many large nonprofit systems (Ascension, CommonSpirit, Kaiser in some markets, Intermountain) directly employ cardiologists and qualify as 501(c)(3) employers.
Who Does Not Qualify
- PE-backed platform cardiologists: CVAUSA (Webster Equity Partners), US Heart & Vascular (Ares Management), and similar PE-backed cardiology management companies are for-profit entities. No PSLF.
- Independent private group partners: Your employer is your own partnership or professional corporation. No PSLF.
- Hospital-owned but for-profit hospital systems: For-profit hospital corporations like HCA or Tenet do not qualify. Employment by a for-profit subsidiary of an otherwise large health system also does not qualify.
The Fellowship PSLF Advantage
A cardiologist who trains at a nonprofit hospital system through the entire pipeline — 3-year internal medicine residency + 3-year cardiovascular fellowship — accumulates 6 years (72 qualifying payments) before earning their first attending paycheck. A cardiologist who enters a qualifying nonprofit employer at fellowship graduation needs only 4 years of attending practice to reach forgiveness. At IBR payment rates during fellowship (roughly $150–$350/month on a $60,000–$80,000 resident/fellow salary), those 72 payments represent minimal cost compared to the balance forgiven. Use the PSLF Payment Tracker Calculator to project your specific timeline and forgiveness balance. If you are not pursuing PSLF, see Physician Student Loan Refinancing.
Retirement Account Stacking by Employment Structure
The annual tax-sheltering capacity varies dramatically by employment setting. In 2026:3
| Employment Structure | Available Accounts | Max Annual Contribution (under 50) | Max (Ages 60–63) |
|---|---|---|---|
| Academic / nonprofit hospital (direct hire) | 403(b) + 457(b) governmental + backdoor Roth | $49,000 combined deferrals + $7,500 backdoor Roth | Up to $59,750 combined + Roth |
| PE-backed platform (for-profit) | 401(k) + possibly non-gov 457(b) + backdoor Roth | $24,500 deferral + $7,500 backdoor Roth | $35,750 with catch-up + Roth |
| Independent private group (partner) | Solo/group 401(k) + cash balance plan + backdoor Roth | $72,000 solo 401k + $100K–$300K+ cash balance + Roth | $83,250 solo 401k + $200K–$400K+ cash balance + Roth |
The tax-sheltering gap between a PE-backed platform employee and an independent practice partner is enormous. A PE-backed cardiologist shelters $24,500–$32,000 in pre-tax accounts per year (before a backdoor Roth). A private practice cardiologist-partner in their 50s can shelter $250,000–$400,000+ annually through a cash balance plan stacked on a solo 401(k). At a 37% marginal rate, the annual difference in tax savings exceeds $80,000.
The 403(b) + Governmental 457(b) Stacking Opportunity
Academic and nonprofit hospital-employed cardiologists with access to both a 403(b) and a governmental 457(b) can max both plans in 2026 — $24,500 each, for $49,000 in pre-tax deferrals, plus a backdoor Roth IRA. These contribution limits are completely independent under the tax code. Each dollar of deferral reduces AGI dollar-for-dollar, which lowers IBR payments under PSLF. A cardiologist with $575,000 in gross income who maxes both plans reduces their PSLF-qualifying IBR payment by the resulting AGI reduction — often $15,000–$20,000 in cumulative PSLF savings over the remaining payment window. See Physician 457(b) Deferred Compensation Guide.
Non-Governmental 457(b) Risk at PE-Backed Cardiology Platforms
Some PE-backed cardiology platforms offer non-governmental 457(b) deferred compensation plans. These plans allow you to defer current income — reducing your tax bill today — but they carry structural risk that physicians in other specialties have already encountered.
Non-governmental 457(b) assets are not held in a separate trust. They remain a general asset of the employer, accessible to the employer's creditors in a bankruptcy or restructuring. If the platform encounters financial difficulty, your deferred compensation balance competes with other unsecured creditors — not protected like a 401(k) or governmental plan. The Envision Healthcare bankruptcy (2023) and the Radiology Partners near-default (2025) are recent examples of what leveraged PE-backed physician platforms look like under financial stress. Cardiology PE platforms carry similar leverage characteristics: PE sponsors typically acquire practices with substantial debt financing, and the revenue profile of a cardiology group — heavily dependent on reimbursement rates, contract retention, and procedural volume — is not immune to the same dynamics.
Cash Balance Plans: The Private Practice Partner's Tax Shelter
For cardiologists who own equity in a private group practice — or who practice in an independent partnership setting — a cash balance defined benefit plan stacked on top of a solo 401(k) or group 401(k) is among the most powerful tax reduction tools available to high-income professionals in the United States.
How the Math Works
A cash balance plan is a defined benefit plan with a fixed annual contribution determined by age and the target retirement benefit. The 2026 §415(b) annual benefit limit is $290,000, and the compensation limit is $360,000.3 Because older participants need larger annual contributions to fund their promised benefit, allowable contributions scale steeply with age:
| Age | Approximate Annual Cash Balance Contribution | Combined with Solo 401(k) ($72K) |
|---|---|---|
| 45 | ~$100,000–$130,000 | ~$172,000–$202,000/year tax-deferred |
| 50 | ~$150,000–$185,000 | ~$222,000–$257,000/year tax-deferred |
| 55 | ~$200,000–$255,000 | ~$272,000–$327,000/year tax-deferred |
| 60 | ~$255,000–$325,000 | ~$327,000–$397,000/year tax-deferred |
Ranges depend on prior accrued benefit, actuarial assumptions, and plan design. Actual amounts require actuarial calculation. Solo 401(k) reflects the $72,000 §415 cap including employer profit-sharing.
An interventional cardiologist earning $700,000 as a private group partner at age 52 who contributes $180,000 to a cash balance plan plus $72,000 to a group 401(k) shelters $252,000 from current-year taxes. At 37% federal plus state, the annual tax savings can exceed $100,000 — before any investment return on the deferred amounts. See Cash Balance Plans for Physicians for the full setup, cost, and employee-coverage framework.
Catheterization Lab and Ambulatory Surgery Center Ownership
Private cardiology group partners sometimes have the opportunity to invest in catheterization laboratories or cardiovascular ambulatory surgery centers affiliated with the group. This ancillary income stream can be substantial — but it involves significant regulatory complexity under the Stark Law and Anti-Kickback Statute.
The Stark Law (42 U.S.C. § 1395nn) prohibits physician self-referral for designated health services (DHS) to entities in which the physician has a financial relationship, unless an applicable exception applies. Cardiac catheterization services are designated health services. The in-office ancillary services exception and the ambulatory surgery center exception each have specific ownership, location, and supervision requirements. Non-compliance carries civil monetary penalties, False Claims Act liability, and exclusion from Medicare and Medicaid — consequences that can financially devastate a practice.
Before investing in any imaging center or ASC affiliated with your practice, engage a healthcare attorney with Stark Law and Anti-Kickback Statute expertise. The upside for compliant cardiology ASC partnerships can be meaningful — partners in high-volume outpatient cath labs and cardiac surgery centers can earn $75,000–$200,000+ annually in ASC distributions — but the compliance framework must be structured correctly from the start. Do not rely solely on your PE platform's legal counsel, whose interests may not align with yours.
Disability Insurance for Cardiologists
Disability insurance planning for cardiologists depends heavily on subspecialty. Insurers classify physician occupational risk largely based on procedural intensity and manual skill requirements — and interventional cardiologists and electrophysiologists are in a different risk class than non-invasive cardiologists.
Subspecialty Risk Classification
- Interventional cardiologists and electrophysiologists: Perform catheterization procedures requiring precise manual technique. Classified in a higher-risk occupational category than non-invasive physicians by most carriers; premiums are elevated accordingly (roughly $8,000–$16,000/year for strong own-occupation coverage at peak attending income), but still lower than surgeons.
- Non-invasive cardiologists (echocardiography, nuclear cardiology, cardiac imaging): Lower-risk occupational class. A disability affecting cognitive function, stamina, or concentration still impairs the ability to practice, but manual skill disability is a lower concern. Premiums are more favorable.
Why Own-Occupation Coverage Is Essential
A cardiologist disabled from performing their specialty's work — whether by a cardiac event, neurological condition, vision loss, or musculoskeletal injury — can no longer serve as a cardiologist, even if they could theoretically work in another capacity. Under an "any occupation" disability definition, an insurer would deny benefits if the physician could do any other job. Under a true own-occupation definition, disability benefits are paid because the cardiologist cannot perform the material duties of their specialty — regardless of other work they might do.
Key features to require:
- True own-occupation definition: Pays if you cannot perform the material duties of your cardiology subspecialty, even if you work in a different capacity.
- Future Increase Option (FIO): Lets you increase coverage as income grows without additional medical underwriting. Purchase during residency or fellowship — this is the last guaranteed window before attending income and potential health developments change your insurability picture.
- COLA rider: Adjusts benefit for inflation during a long-duration disability.
- Residual disability: Pays partial benefits if you can still practice but at reduced capacity. Important if a disability reduces your cath lab volume or call schedule without completely ending your career.
Use the Physician Disability Coverage Calculator to estimate your coverage gap. An employer LTD policy covering 60% of a $575,000 salary — taxable if employer-paid premiums were pre-tax — nets roughly $140,000–$175,000 annually, far below the income needed to sustain lifestyle, loan obligations, and retirement contributions built for a high-earning specialist. See Physician Disability Insurance Guide.
Private Equity Buyout Considerations for Cardiology Group Partners
Cardiology has become one of the most active sectors for private equity consolidation. The number of PE-backed cardiology platforms more than doubled between 2022 and 2023, and acquisition activity through the first half of 2025 matched the full-year pace of 2024.4 If your group receives a PE acquisition offer, the financial planning decisions deserve careful analysis before any letter of intent is signed.
- Asset vs. stock sale structure: PE buyers typically prefer asset sales (step-up in basis favors them). Partners prefer stock sales (capital gains rates on the proceeds). The personal goodwill doctrine — where a physician's professional referral relationships constitute personal goodwill separate from the entity — can allow cardiologists to allocate a portion of the sale price to capital gains taxed at 23.8% (LTCG + NIIT) rather than 37% ordinary income. For group partners receiving $1M–$4M in a buyout, this allocation is often worth $100,000–$400,000 in additional after-tax proceeds. See Physician Practice Exit Planning.
- QSBS §1202 eligibility: If the group was structured as a C-corp and original stock was acquired after August 10, 1993, gain on qualifying small business stock may be eligible for the QSBS exclusion — $15M under OBBBA (2025) for stock held 5+ years. Verify eligibility with a tax attorney before finalizing deal structure. See Physician Private Equity Buyout Guide.
- Rollover equity evaluation: PE buyers typically require partners to roll 20–30% of deal proceeds into equity in the acquiring platform. Rollover equity has upside if the platform grows and exits at a higher multiple — but it also concentrates your net worth in a single illiquid, leveraged position. Understand the capital structure, the debt load, the sponsor's hold period and exit strategy, and how rollover equity is valued at entry before treating it as part of your retirement plan.
- Pre-close retirement stacking: The year before a practice sale is the last year to maximize solo 401(k) and cash balance contributions as a practice owner. A cardiologist partner in their 50s can shelter $250,000–$400,000+ in the final pre-sale year — a one-time opportunity that disappears upon closing. Do not wait until after the transaction to plan this. See Cash Balance Plans for Physicians.
- Non-compete geographic cost: PE buyers impose non-compete agreements that restrict practice within a defined radius for a defined period. Evaluate the geographic scope carefully — a broad non-compete that prevents you from joining another cardiology group in the same metro area is more economically costly than it appears on term sheets. See Physician Employment Contract Financial Review.
Common Financial Mistakes Cardiologists Make
- Refinancing student loans without confirming PSLF ineligibility. Cardiologists who plan to join an academic medical center or nonprofit hospital system should not refinance student loans before confirming PSLF eligibility via MOHELA. Refinancing permanently terminates PSLF eligibility. Given 6 years of fellowship PSLF credits already banked, the cost of refinancing before confirming you can't use PSLF can be $200,000–$400,000 in forgiven debt lost.
- Not maxing both the 403(b) and governmental 457(b). Hospital-employed cardiologists with access to both plans frequently max one and ignore the other. These are separate limits — $24,500 each in 2026 — and each dollar reduces AGI, which reduces IBR payments under PSLF. Missing this stacking opportunity costs both retirement savings and PSLF payment savings simultaneously.
- Assuming PSLF eligibility based on the hospital building, not the W-2 employer. A cardiologist staffed at a nonprofit hospital by a PE-backed cardiology management company is employed by a for-profit entity. The practice management company on your W-2, not the hospital whose patients you treat, determines PSLF eligibility. Verify at MOHELA before your first attending payment.
- Contributing to a non-governmental 457(b) before evaluating employer financial health. PE-backed platforms carry leverage. The Envision Healthcare and Radiology Partners situations illustrate the real cost of deferred compensation at a financially stressed employer. Non-governmental 457(b) balances are unsecured obligations — not savings accounts. Confirm plan type and evaluate platform financial health before contributing.
- Not establishing a cash balance plan as a private group partner. Independent cardiologists and interventional cardiologists earning $600,000–$900,000+ who shelter only $24,500 or even the $72,000 solo 401(k) maximum are leaving enormous tax savings on the table. At ages 45–60, a cash balance plan can shelter $100,000–$325,000 per year above the solo 401(k). Most private practice cardiologists who haven't set one up are missing the single largest tax planning opportunity available to them.
- Delaying disability insurance until after fellowship. The Future Increase Option (FIO) rider — available at initial purchase — guarantees future coverage increases without additional medical underwriting. A cardiologist who buys at 27 during residency locks in guaranteed insurability for the rest of their career. Waiting until 35 or 40, after any health issues have emerged, risks exclusions, premium loadings, or outright declination.
- Ignoring Stark Law compliance in cath lab or ASC investments. Self-referral arrangements in cardiology carry substantial legal exposure. A financially attractive ownership opportunity structured incorrectly can result in False Claims Act liability worth multiples of the investment gain. Always engage healthcare counsel before entering any ownership arrangement tied to services you perform or refer.
Action Plan by Career Stage
Residents and Fellows (PGY-1 Through Fellowship)
- Certify PSLF employment with MOHELA from your first internal medicine residency year if your training program is at a qualifying nonprofit. Each of the 6 training years is a year toward 10 — banking qualifying payments at low IBR amounts during fellowship is one of the best financial decisions cardiologists can make.
- Open a Roth IRA during residency. You're in the 22% bracket or below — the last window for direct Roth IRA contributions (phase-out for single filers begins at $153,000 in 2026). See Backdoor Roth IRA for Physicians.
- Buy individual own-occupation disability insurance before fellowship ends. Interventional cardiologists and electrophysiologists: include the FIO rider and confirm your subspecialty is covered under the own-occupation definition. Non-invasive cardiologists: FIO and COLA riders remain essential.
- Do not refinance student loans if there is any possibility you join an academic or nonprofit hospital-based practice. Six years of fellowship credits are valuable. See the OBBBA physician student loan guide for the current IDR landscape (SAVE eliminated; IBR and RAP available).
Early-Career Attending (Years 1–5)
- Verify your employer's PSLF eligibility at MOHELA using the exact entity on your W-2 — not the hospital's name, the PE platform's name, or the health system's branding. If you are at a PE-backed platform, PSLF is off the table; evaluate refinancing via Physician Student Loan Refinancing.
- If at a nonprofit hospital with 403(b) + governmental 457(b): max both immediately. The $49,000 combined deferral reduces AGI and lowers IBR payments simultaneously. Do not leave either plan partially funded.
- If at a PE-backed platform: max the 401(k), execute backdoor Roth, and confirm whether any 457(b) is governmental or non-governmental before contributing. See Physician Investment Portfolio Guide for taxable account strategy after exhausting tax-advantaged space.
- Begin building a 6–12 month emergency fund. The cardiology labor market is shifting rapidly; PE platform consolidations can result in contract changes, non-compete enforcement, or employment disruptions on relatively short notice.
Mid-Career Cardiologist (Years 5–15)
- If you're a private group partner, model the cash balance plan now. The contribution capacity at ages 45–55 is highest relative to the compounding runway that remains. Work with a CPA and independent actuary who specialize in physician practice owners — not the same firm managing the PE platform's retirement plan.
- If PSLF forgiveness is within 2 years, do not overpay or make extra loan payments. IBR minimum payments to forgiveness is the optimal strategy. Use the PSLF Payment Tracker to confirm your projected forgiveness date and balance.
- If your group is receiving PE acquisition inquiries, engage a healthcare M&A attorney and an independent CPA before any discussions begin. Personal goodwill analysis, pre-close retirement stacking, and QSBS evaluation require lead time — starting this after the letter of intent is signed is too late for most planning strategies.
- Evaluate Roth conversion opportunities. The years when your cardiology income is near its peak are generally not ideal for large Roth conversions (you'd convert at 37%). Plan conversions for transition years — between positions, or post-practice-sale before age 63. See Physician Roth Conversion Strategy.
Late-Career Cardiologist (Years 15+)
- Cash balance plan contributions peak in your late 50s and early 60s. If you haven't established one as a practice owner or have undercontributed in prior years, the window is closing. A cardiologist in their early 60s with $300,000+ in combined annual contributions can build $1M+ in tax-deferred retirement assets in 4–5 years.
- Manage IRMAA cliffs in the years before Medicare enrollment. Practice sale proceeds, 457(b) distributions, and IRA RMDs can each trigger Medicare surcharges two years later. See Physician IRMAA Medicare Planning.
- Model Social Security claiming strategy. Cardiologists with substantial retirement assets can afford to delay claiming to age 70 for maximum benefits. The 2026 maximum at age 70 is $5,181/month for a top-40-year earner. See Physician Social Security Guide.
- Consider estate planning updates. At $15M estate exemption (OBBBA, permanent), federal estate tax may not apply to most cardiologists — but state estate taxes, business succession, and practice buy-sell agreements still require current planning. See Physician Estate Planning Guide.
Related guides for cardiologists
- PSLF Payment Tracker Calculator
- Physician Student Loan Calculator: PSLF vs IBR vs Refinance
- Physician 457(b) Deferred Compensation: Governmental vs Non-Governmental
- Cash Balance Plans for Physicians
- Solo 401(k) for Physicians
- Physician Disability Insurance: Own-Occupation and Key Riders
- Physician Disability Coverage Calculator
- Physician Practice Buy-In Guide
- Physician Practice Sale and Exit Planning
- Physician Private Equity Buyout Guide
- Physician Employment Contract Financial Review
- Backdoor Roth IRA for Physicians
- Physician Student Loan Refinancing
- Physician IRMAA Medicare Planning
- Physician Roth Conversion Strategy
- OBBBA and Physician Student Loans
Talk to a financial advisor who understands cardiologist finances
The interaction between employment structure, PSLF eligibility, 403(b)+457(b) stacking, non-governmental 457(b) risk, cash balance plan opportunities, and PE buyout evaluation is genuinely complex — and the decisions made in the first years of attending practice determine outcomes a decade later. A fee-only financial advisor who specializes in physician planning can model your specific numbers: your loan balance, your PSLF timeline, your retirement account capacity, your disability coverage gap, and your practice equity value. We match cardiologists with fee-only advisors who understand this specialty's financial landscape.
Sources
- Cardiovascular Business / Medscape. Cardiologists Now Earn More Than Radiologists or Plastic Surgeons. CardiovascularBusiness.com. Citing Medscape 2026 Physician Compensation Report (2025 earnings): cardiologist average compensation $575,000, up 10% from $520,000; second-highest specialty behind orthopedics ($611,000). Verified June 2026.
- U.S. Department of Education / MOHELA. Public Service Loan Forgiveness (PSLF). StudentAid.gov. Qualifying employer requires a U.S. government entity, 501(c)(3) nonprofit, or other eligible public service organization. PSLF eligibility is determined by the physician's direct employer of record, not the facility or hospital in which they practice. Verified June 2026.
- Internal Revenue Service. IRS IR-2025-244: Retirement plan contribution limits for 2026. IRS.gov. 401(k)/403(b)/457(b) elective deferral limit: $24,500; age-50+ catch-up: $8,000; SECURE 2.0 ages 60–63 super catch-up for 401(k)/403(b): $11,250; §415 total limit: $72,000; §415(b) defined benefit limit: $290,000; §401(a)(17) compensation limit: $360,000. Verified June 2026.
- Becker's ASC Review. Cardiology and Private Equity in 2026: 5 Notes. BeckersASC.com. PE-backed cardiology platforms more than doubled since 2022; 50+ platforms with 320+ locations by 2023; Cardiovascular Associates of America (Webster Equity Partners) and US Heart & Vascular (Ares Management) are the two largest PE-backed platforms; 6 acquisitions in first half of 2025 matching full-year 2024 pace; 70%+ of cardiologists now employed by hospitals or large health systems. Verified June 2026.
- Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes). IRS.gov. 2026 SS wage base: $184,500. SE tax: 15.3% on net SE income × 0.9235 up to wage base; 2.9% above. Additional Medicare Tax: 0.9% on income over $200K (single)/$250K (MFJ). Verified June 2026.
Income figures are illustrative ranges based on reported compensation data; individual compensation varies by subspecialty, setting, location, experience, and contract structure. PSLF savings examples are estimates; actual forgiveness amounts depend on specific loan balance, interest rate, income trajectory, and payment history. Retirement contribution ranges are illustrative; cash balance plan contributions require actuarial calculation. Tax values reflect 2026 IRS published limits. Stark Law / Anti-Kickback Statute summary is not legal advice; consult a healthcare attorney before entering any cath lab or ASC ownership arrangement. QSBS eligibility depends on entity structure and stock acquisition date; consult a tax attorney. Verified June 2026.