Is a Fellowship Worth It Financially? The 2026 Math by Specialty

Most internal medicine and pediatrics residents face the same question in their second year: start practice, or spend one to three more years training. The money side of that question is arithmetic. A fellowship costs the attending pay you give up while you train, and pays you back only if the specialty earns more than the generalist job you would have taken, for long enough to recover the difference.

This guide works through that arithmetic for 20 common fellowships, using the AAMC's fellow stipends, Doximity's 2026 pay averages, and 2026 federal tax. Every figure in the tables is computed from those inputs with the assumptions stated below, so you can see where each number comes from. For pay in a single specialty, see our internal medicine salary and pediatrician salary guides.

What fellows are paid

Fellows are paid on the resident stipend scale. Programs set pay by training year, not by specialty: in the AAMC's 2025 survey, 96.9% of institutions with more than one specialty paid the same base stipend at each level. After a three-year internal medicine or pediatrics residency, fellowship years are PGY-4, PGY-5 and PGY-6. The AAMC's figures are as of July 1, 2025, so they are the 2025-26 stipends.

Region moves pay more than a training year does. In the AAMC's weighted averages, first-year stipends run from $65,076 in the South to $77,649 in the West, and eighth-year stipends from $86,768 to $107,587; fellowship years fall between the two.

The model below uses the national averages. A stipend $10,000 lower than average adds about $7,035 after tax to the cost of each fellowship year, which is small next to the attending pay a fellow gives up. Fellows can often add income by moonlighting, with their program's approval; see our moonlighting guide.

What a fellowship costs: the pay you give up

The real cost of a fellowship is not the stipend. It is the difference between the stipend and what you would have earned as a generalist in the same years. For internal medicine we use Doximity's 2026 average for internists, $339,274; for pediatrics, its average for general pediatricians, $273,665.

Taxes shrink the cost by about 33%, because attending pay is taxed at much higher rates than a stipend. For pediatrics, where the generalist earns less, a three-year fellowship gives up about $576,851 gross, or $397,788 after tax.

The pay premium by fellowship

The return is the gap between the specialty's pay and the generalist's, every year after fellowship. Doximity's 2026 averages put the procedural fellowships far ahead, the consultative ones close to even, and several below the generalist:

• Internal medicine: cardiology averages $604,635, +$265,361 over the $339,274 internist average; gastroenterology +$192,071; pulmonology +$102,198; nephrology +$46,691. Infectious disease is -$1,921, endocrinology -$29,492 and geriatric medicine -$34,863.
• Pediatrics: pediatric cardiology (+$91,730) and neonatology (+$90,723) lead; pediatric endocrinology (-$31,391) and infectious diseases (-$55,846) pay less than general pediatrics.

Doximity reports oncology and hematology separately, while most physicians reach both through a three-year combined hematology-oncology fellowship, so both rows appear below with that fellowship. Doximity's pulmonology average stands in for pulmonary and critical care, which it doesn't report separately. Fellowship lengths are the ACGME's required program lengths for internal medicine subspecialties and the American Board of Pediatrics' three-year requirement for pediatric subspecialties.

Break-even and lifetime value, by fellowship

How the model works:

1. Two paths from the end of residency. The generalist earns the generalist average every year. The fellow earns the AAMC stipend for each fellowship year (PGY-4 onward), then the specialty average.
2. Same career length. Both stop working 30 years after residency, so a fellow has 27 attending years after a three-year fellowship.
3. After tax. Each year's pay is converted to take-home pay for a single filer in Texas under 2026 federal tax, with no retirement contributions.
4. Today's dollars. Stipends and attending pay are assumed to rise only with inflation, so all figures are in 2026 dollars.
5. Discounting. The present value discounts each year's difference at 3% a year after inflation, back to the end of residency. That reflects that money earned sooner can be invested or used to pay down debt.

Break-even is the number of years of practice after fellowship until the fellow's total take-home pay catches up with the generalist's. Career difference is the total after-tax gap over the 30 years, and present value is the same gap discounted.

Internal medicine fellowships vs. general internal medicine ($339,274)

Pediatric fellowships vs. general pediatrics ($273,665)

What the tables show:

• The procedural fellowships pay back fast. cardiology (3.1 years), gastroenterology (4.3 years) and oncology (4.6 years) break even soonest. Cardiology is worth about $4.0 million more after tax over the career, or $2.3 million in present value.
• The middle group takes most of a decade or more. Pulmonology and critical care, hematology, pediatric cardiology and neonatology break even 7 to 8 years after fellowship. Nephrology takes 12.0 years, pediatric emergency medicine 10.8 years and pediatric gastroenterology 16.8 years. Discounted at 3%, each takes longer: nephrology 15.3 years, pediatric gastroenterology 24.8 years.
• 10 of the 20 fellowships lose money against the generalist path in present value. The largest losses are pediatric infectious diseases (-$990k) and pediatric rheumatology (-$789k), and in internal medicine endocrinology (-$661k).

At a higher 6% discount rate, which you might use if you would otherwise be paying down high-rate debt or investing aggressively, the winners still win (cardiology $1.4 million, nephrology $28k) but the marginal ones shrink or turn negative: pediatric gastroenterology goes to -$92k.

How big a raise a fellowship needs

Turned around, the same model shows the smallest pay premium that makes a fellowship break even in present value over a 30-year career. Compare it with what the jobs you would take actually pay, not only with survey averages.

The hurdle is lower for pediatrics because the generalist pay given up is smaller. Each extra year of training raises it by roughly $17k a year for internal medicine.

What the averages hide

• New attendings earn less than the average. Survey averages include physicians at the peak of their careers. In nephrology, the American Society of Nephrology's 2025 survey put the median starting base salary for fellows entering practice at $249,000, far below the $385,965 average; see our nephrology salary guide. The generalist path has a ramp too, but where a specialty's pay rises mainly through partnership or ownership, early-career returns are smaller than the tables show.
• The job you take matters more than the average. Within cardiology, interventional and electrophysiology jobs pay far more than general cardiology; in many specialties private practice pays more than academic jobs. A fellowship that leads to an academic job at a children's hospital may pay well below its specialty average.
• The generalist has choices too. Hospital medicine (SalaryDr median $345,000), nocturnist work and rural jobs can pay well above the internist average, which raises the bar for every fellowship.
• State taxes shrink the premium. In California, the after-tax premium for cardiology is about $134,314 a year instead of $166,249 in Texas, and break-even moves to 3.3 years.
• Hours and call. The model compares pay, not pay per hour. Some higher-paid fellowships come with heavier call, and some lower-paid ones with more predictable schedules.

Student loans during fellowship

Fellowship changes the loan math in two ways: more years of low payments, and, for PSLF borrowers, more of the 120 payments made at stipend income.

Payments as a fellow

On an income-driven plan, your payment follows your income. IBR charges 10% of income above 150% of the poverty guideline (for borrowers who first borrowed after July 1, 2014), capped at the 10-year standard payment. RAP charges 1% to 10% of your whole adjusted gross income by $10,000 bracket, minus $50 a month per dependent, with a $10 minimum. For a single fellow with $5,000 of pre-tax deductions:

IBR is open only to borrowers whose federal loans were all disbursed before July 1, 2026; a new loan or consolidation on or after that date leaves RAP or the Tiered Standard Plan. See IBR vs. RAP for the full comparison.

PSLF: fellowship years count

Most fellowships are at nonprofit or government hospitals, which are qualifying employers for Public Service Loan Forgiveness, and payments under IBR or RAP during fellowship count toward the 120. That makes a fellowship cheaper for PSLF borrowers: more of the ten years are paid at stipend income, and more of the balance is forgiven, tax-free. The table runs our student loan hub's model: $215,000 of federal debt (the AAMC median for the class of 2025) at 6.5%, payments from the first month of residency, every employer qualifying, and the specialty's Doximity average after training.

On IBR, the cardiologist pays about $67,590 less than the general internist before forgiveness, because three of the ten years are at fellow pay and IBR's cap holds both attending payments near $2,441 a month. On RAP, which has no cap, the cardiologist's attending payments are much larger and the loan is nearly paid off by payment 120, so the cardiologist pays about $29,072 more than the internist. If you are pursuing PSLF through a fellowship, IBR is usually the better plan if you have it; and a month between residency and fellowship without qualifying employment can cost you a payment. Check your employer with does my hospital qualify for PSLF.

If you aren't pursuing PSLF

Without forgiveness, a fellowship mostly delays repayment. Interest keeps accruing on a stipend-sized payment: in the same model on IBR, the balance at the end of training is about $244,410 after a three-year residency and $270,603 after six years of residency and fellowship. RAP waives unpaid interest each month you pay in full and on time, so on RAP the balance falls slowly instead ($211,400 after six years). Either way, refinancing is usually best left until you know where you will work after fellowship; see PSLF vs. refinancing.

Reasons that aren't about money

Most physicians don't choose a fellowship on pay alone, and for the fellowships that lose money, the reasons are elsewhere:

• The work itself: the patients, procedures and problems you want to spend thirty years on.
• Schedule and call: outpatient-heavy specialties can offer more predictable hours than hospital medicine or primary care.
• Academic and research careers: many academic jobs expect subspecialty training.
• Job options: a subspecialty can open, or close, certain markets; some are concentrated in cities and children's hospitals.
• The cost in time: one to three more years of training, often in a new city, at a stage when many people are starting families.