A new attending earning $300,000 can get approved for a $1.2–1.5 million mortgage with $0 down before the first paycheck clears. The same physician, carrying $250,000 in student loans and actually funding retirement, can comfortably afford a house in the $500,000–$600,000 range. The gap between those two numbers — roughly $700,000 of house — is where a decade of financial flexibility quietly disappears.
This is not an argument against buying, and it is not an argument against physician mortgages, which are a genuinely useful product when used deliberately. It is an argument against letting the approval letter set the budget. Lenders answer "how much will we lend you?" That question has nothing to do with "how much house keeps your loans, retirement, and life funded at the same time?" Only the second question matters, and you can answer it from your own pay stub in twenty minutes.
Why "how much can I borrow" is the wrong question
Physician mortgage programs exist because doctors are exceptional credit risks: high income, extreme job stability as a profession, and default rates lenders love. So the product is generous — at most lenders, 0% down up to $750,000–$1 million, no PMI, qualification based on your signed employment contract before you have even started, and income-driven student loan payments (rather than balances) counted in your debt-to-income ratio.
Every one of those features increases the maximum you can borrow. None of them changes what you can afford. The lender's debt-to-income math typically allows total debt payments well above 40% of gross income. It does not know that you intend to put $24,500 into a , $7,500 into a , and real money toward $250,000 of student loans. It does not price in , childcare, or the possibility that your first job is the wrong job.
Important
The approval letter is a statement about the lender's risk, not your budget. A bank that approves a $1.4 million loan on a $300,000 income is not predicting you will thrive with that payment — it is predicting you will make it, even if everything else in your financial life gets squeezed to do so.
The "you can borrow 5× your income" framing you will hear from loan officers and physician-focused mortgage content is marketing arithmetic. It is true in the narrow sense that the loan may close. The physicians who regret their first house almost never regret the house itself — they regret what the payment crowded out.
The affordability framework: start from monthly cash flow
Work the problem in this order, from your actual take-home pay — not from gross income, and not from a percentage rule built for the median household.
- Start with monthly take-home. After taxes and pre-tax deductions, a $300,000 single attending nets roughly $15,000–$15,500 per month in a moderate-tax state (see our paycheck decoder math for the full derivation).
- Subtract the student loan payment you actually intend to make. Not the minimum that makes the DTI work — the real number from your strategy, whether that is an income-driven payment on a track or an aggressive payoff schedule.
- Subtract retirement savings as a fixed obligation. A reasonable target for a new attending is around 20% of gross. The 401(k) piece is already out of your take-home; budget the rest — backdoor Roth and taxable investing — as a non-negotiable monthly transfer.
- Cap all-in housing at roughly a third of what remains. All-in means principal, interest, property taxes, homeowners insurance, plus maintenance and utilities — for a single-family home, budget 1–2% of the home's value per year for upkeep alone.
What survives that arithmetic is your housing number. It will be smaller than the approval letter. That is the point.
Worked example: a $300,000 attending with $250,000 in loans
Assumptions, stated explicitly: $300,000 W-2 salary, single filer, moderate-tax state, maxing the 2026 401(k) deferral of $24,500, $250,000 of federal student loans at a 6.8% weighted average being paid on a 10-year schedule, saving 20% of gross for retirement overall.
Example calculation
Monthly take-home (after federal tax, FICA, state tax, 401(k), health premiums): ≈ $15,250
− Student loans (10-year payoff, $250,000 at 6.8%): $2,877 − Retirement beyond the 401(k) (backdoor Roth $7,500/yr + taxable ≈ $28,000/yr): $2,950
= $9,423 remaining for housing and everything else
Housing cap at ~⅓ of remainder: ≈ $3,100–3,400 all-in per month — call it $3,250, of which roughly $2,700–2,900 can be PITI once maintenance and utilities are carved out.
Now translate the payment into a purchase price. At an illustrative 6.75% 30-year fixed rate with 0% down on a physician loan, principal and interest run about $649 per month per $100,000 borrowed. A $425,000–$475,000 loan produces roughly $2,750–$3,100 of P&I; adding property taxes and insurance lands the all-in number near the cap. If you arrive with a 10% down payment instead, the comfortable purchase price moves toward $500,000–$550,000.
The 6.75% rate is an illustration, not a forecast — mortgage rates move with the market. Rerun the arithmetic at the rate you are actually quoted: higher rates pull the comfortable purchase price down, lower rates push it up, and the framework holds either way.
Compare that to the approval-letter version of the same physician:
| Scenario | Loan amount | P&I/month | All-in housing | Share of $15,250 take-home |
|---|---|---|---|---|
| Cash-flow framework | $450,000 | ≈ $2,920 | ≈ $3,600 | 24% |
| "Comfortable stretch" | $600,000 | ≈ $3,892 | ≈ $4,700 | 31% |
| Maximum approval (~5× income) | $1,400,000 | ≈ $9,081 | ≈ $10,800 | 71% |
The maximum-approval scenario is not an exaggeration — loans like this close for new attendings regularly. At $10,800 of monthly housing, this physician can still make the student loan payment or fund retirement properly, but not both. The spreadsheet forces a choice the loan officer never mentioned.
Key insight
Every $100,000 of additional house costs roughly $650 per month at current rates — about $7,800 per year of after-tax income. Asked directly — "would you pay $7,800 a year for the next tier of house?" — many physicians say no. The purchase price hides the question; the monthly payment answers it.
Married with a non-working spouse? The MFJ brackets lower the federal bill by roughly $15,000 at this income (larger standard deduction plus wider brackets), adding about $1,250 of monthly capacity — meaningful, but it disappears the moment the household adds spending to . A working spouse changes the math far more than filing status does.
The dials that legitimately change your number
The framework is not a fixed verdict; it is arithmetic with inputs you can change. The honest ways the number moves up:
- PSLF track. If you are pursuing PSLF at a qualifying employer, your income-driven payment may be far below the $2,877 in the example — often $1,500–$2,200 at this income depending on plan and family size. That can add several hundred dollars of monthly housing capacity. The risk: build the budget on the payment and a later job change to a non-qualifying employer breaks both your forgiveness timeline and your housing math at once.
- A second income. A two-physician household, or a physician plus a working spouse, changes everything — but budget on the income you would keep if one of you changed jobs, cut back after a child, or burned out.
- No loans or small loans. A physician who exits training with $80,000 instead of $250,000 frees nearly $2,000 per month. That is roughly $300,000 of additional purchase price under the same framework.
- Low cost-of-living markets. In much of the Midwest and South, $450,000 buys a genuinely excellent house. The framework does not demand sacrifice everywhere — it just refuses to let the coasts pretend the math does not apply.
The dishonest ways the number moves up: assuming the signing bonus repeats, counting projected bonuses as guaranteed, planning on forever, or treating the lender's IDR-based DTI as proof the loans are handled.
That last one deserves a number. Most physician-loan underwriters count your income-driven payment — say, $1,800 per month — instead of the $2,877 a 10-year payoff of $250,000 actually requires. That single substitution adds roughly $150,000–$175,000 to the loan you qualify for at current rates. If you are genuinely on a PSLF track, the IDR payment is your real payment and the bigger approval is honest. If you intend to pay the loans off, the lender just approved you for a house using a loan strategy you do not have. Make sure the payment in the DTI is the payment in your plan.
Property taxes and insurance: the same house, $700 a month apart
The framework caps all-in housing, and the gap between P&I and all-in is the most regionally variable number in the whole calculation. Two physicians buying identical $500,000 houses can owe monthly payments that differ by more than $700 before either one touches the thermostat — entirely from property taxes and homeowners insurance. Illustrative mid-2026 figures for a $500,000 house:
| Market (illustrative) | Effective property tax | Annual tax | Annual insurance | Tax + insurance per month |
|---|---|---|---|---|
| New Jersey / Illinois suburb | ~2.2% | $11,000 | $1,900 | ≈ $1,075 |
| Texas metro | ~1.9% | $9,500 | $3,200 | ≈ $1,058 |
| Coastal Florida | ~0.9% | $4,500 | $7,000 | ≈ $958 |
| Western Pennsylvania | ~1.5% | $7,500 | $1,500 | ≈ $750 |
| Mountain West | ~0.55% | $2,750 | $1,700 | ≈ $371 |
The interactions matter as much as the levels. Texas and Florida advertise no state income tax; a meaningful slice of that saving comes back out through the property tax bill or the insurance market, and unlike income tax it does not fall if your income does. Run the framework with your county's actual rate and a real insurance quote — not a national average — before translating the monthly cap into a purchase price.
Important
The escrow-shock trap: on new construction, the first year's property tax is often assessed on the unimproved lot. When the county reassesses the finished house, the escrow payment can jump $400–$800 per month in year two — on a payment you sized to the maximum. Resale buyers face a milder version when a sale triggers reassessment at the new, higher price. Ask the lender to escrow against the post-reassessment estimate, and budget from that number.
Insurance compounds the same way. Premiums in coastal and wildfire-exposed markets have repriced sharply in recent years, and escrow analyses pass every increase straight into the monthly payment. A house at the top of your framework cap has no room to absorb a $250 monthly escrow adjustment; a house 10% below the cap shrugs it off.
Rent first: the strongest move almost nobody makes
The least-discussed input in physician home affordability is the probability that your first job is temporary. First-job attrition among attendings is high enough that recruiters and health systems plan around it — bad call schedules, partnership promises that drift, culture mismatches, and two-physician household logistics all surface in the first 12–24 months, after the contract is signed and the boxes are unpacked.
Selling a house is expensive. Between agent commissions, transfer taxes, and transaction costs, a round trip commonly consumes 8–10% of the home's value. On a $600,000 house, that is roughly $50,000–$60,000 — and with 0% down on a physician loan, two years of payments have built only modest equity to absorb it. Sell early into a flat market and you can owe money to leave a house you no longer want, in a city you no longer work in.
Example calculation
$600,000 house, 0% down physician loan at 6.75%, sold after 24 months:
- Equity built through principal paydown: ≈ $13,000
- Selling costs at 9%: ≈ $54,000
- Required appreciation just to break even: ~7% in two years — before counting maintenance, or comparing against what renting would have cost.
Renting for the first 12–24 months costs something — rent is not zero — but it buys the single most valuable option a new attending has: the ability to leave a bad job without a real estate transaction attached. It also lets you learn the city, the commute, and the neighborhoods before committing, and lets a couple confirm both careers are stable before anchoring to one location.
Quick takeaway
Buy when three things are simultaneously true: you are 12+ months into the job and want to stay, your loan strategy is funded and on autopilot, and the all-in payment fits the cash-flow framework. Two of three is a rental.
Common questions
Is the 28% of gross income rule fine for physicians?
It is a reasonable ceiling but a poor target, and gross-income rules behave badly at physician incomes. At $300,000, 28% of gross is $7,000 per month — about 46% of actual take-home once taxes, retirement, and loan reality are applied. Rules of thumb built for median incomes assume tax rates and savings obligations you do not have. Use cash flow.
Should I pay off my student loans before buying?
Not necessarily — at $250,000 of loans that could mean renting for five years or more. The framework treats the loan payment as a fixed line and sizes the house around it, which lets you do both deliberately. The exception: if your loan strategy is genuinely unsettled — undecided between PSLF and payoff, or waiting on regulatory clarity for your repayment plan — settle that first, because the monthly numbers differ by thousands and the house should be sized to the real one.
Does a physician mortgage change how much I can afford?
No — it changes how much you can borrow and when. Buying with 0% down and no PMI is a genuine advantage if the underlying payment fits the framework; it preserves cash for an emergency fund and investing. It is a trap precisely when the no-down-payment feature is what makes an unaffordable house feel reachable. The instrument is neutral; the budget discipline is not.
What about buying during residency or fellowship?
The math is harder than the lore suggests: resident income supports a small payment, tenure is definitionally 3–7 years, and the break-even math above applies with less margin. It can work in low-cost cities with stable two-income households and a plan to stay for fellowship or a first job. For most residents, the honest answer is that the down-payment-sized energy is better spent on Roth contributions and disability insurance.
How big should my emergency fund be before buying?
Larger than it was as a renter. Three to six months of the new expense structure — including the mortgage, taxes, insurance, and maintenance — held in cash. A house with 0% down and no reserves is the most fragile financial structure in medicine: one disability gap or job loss away from forced sale.
What to do next
- Compute your real monthly take-home from an actual pay stub — not a salary calculator's guess.
- Fix your student loan strategy first — PSLF track or payoff schedule — and write down the monthly payment it implies.
- Set the retirement transfer (401(k) election plus automatic backdoor Roth and taxable investing) before you set a housing budget.
- Run the framework: take-home − loans − retirement, then a third of the remainder as your all-in housing cap. Translate to purchase price at today's actual rates, not last year's.
- If you are under 12 months into the job, price rentals seriously — including what the saved difference would do invested for two years.
- Get pre-approved for the framework number, not the maximum. Tell the lender the loan size you want; do not ask what you qualify for.
The first-year attending playbook inside Attending Financial runs this exact sequence against your real paycheck, loan balances, and state taxes — and shows you the purchase price your cash flow supports before a lender shows you the one their risk model does.