You are buying a $600,000 house, and the down-payment decision puts $120,000 on the table — money you either have after some disciplined attending years, or money you would need two to three more years to save. The physician loan versus conventional question is usually argued with slogans from both sides: "never pay PMI" from one camp, "never pay the doctor-loan rate premium" from the other. Both slogans are half right, and neither survives contact with the actual arithmetic. This article works all three ways to finance the same house at a dated 2026 rate, runs the opportunity-cost argument honestly in both directions, prices the risk nobody advertises, and ends with a decision rule keyed to the one variable that should actually pick your loan: your liquidity position. The underwriting mechanics live in the physician mortgage module; the vocabulary lives in the plain-language explainer.
Three ways to buy the same $600,000 house
All numbers below use the Freddie Mac Primary Mortgage Market Survey average 30-year fixed rate of 6.49% for the week of July 9, 2026 as the conventional anchor. The physician loan is priced at an illustrative 0.25-percentage-point premium (6.74%) — physician programs are commonly quoted 0.125 to 0.375 points above conventional, but that range comes from industry commentary rather than a published survey, so treat it as illustrative and let your own same-day quotes replace it. PMI is assumed at 0.5% of the loan per year, the strong-credit end of the 0.46% to 1.5% range reported by the Urban Institute.
| A: 20% down conventional | B: 0% down physician loan | C: 10% down conventional + PMI | |
|---|---|---|---|
| Cash down | $120,000 | $0 | $60,000 |
| Loan amount | $480,000 | $600,000 | $540,000 |
| Rate (labeled above) | 6.49% | 6.74% (illustrative) | 6.49% |
| Principal and interest | $3,031/mo | $3,888/mo | $3,410/mo |
| PMI | none | none | ≈ $225/mo until cancellation |
| Total monthly (P&I + PMI) | $3,031 | $3,888 | ≈ $3,635 |
Option B costs $857 per month more than option A, forever, for the privilege of keeping $120,000 in your pocket today. That sentence is the entire decision, and the rest of the article is about pricing it correctly.
The lifetime arithmetic, shown rather than asserted
Example calculation
Assumptions, stated explicitly: rates as labeled in the table above; all three loans held the full 360 months with no refinance and no prepayment; PMI on option C at 0.5% per year ($225/month) until borrower-requested cancellation at 80% of original value, which the amortization schedule reaches at roughly month 94.
Option A — total interest: $3,031 × 360 − $480,000 ≈ $611,100 Option B — total interest: $3,888 × 360 − $600,000 ≈ $799,600 Option C — total interest: $3,410 × 360 − $540,000 ≈ $687,500 Option C — total PMI: $225 × 94 months ≈ $21,200
B pays ≈ $188,500 more lifetime interest than A. C pays ≈ $76,400 more interest than A, plus ≈ $21,200 of PMI.
Two honesty notes before the low-down camp objects. First, almost nobody holds a mortgage 360 months without refinancing or moving, so lifetime figures overstate every gap — but they overstate them proportionally, and the ranking survives. Second, the comparison so far ignores what options B and C do with the cash they kept. That is the strongest argument the low-down side has, so give it its full weight next.
The opportunity-cost argument, run honestly in both directions
The standard case for option B: do not bury $120,000 in home equity earning nothing; invest it.
Example calculation
Assumptions, stated explicitly: 6% nominal annual return, 30 years, taxes and investor behavior ignored on both sides — the same simplifications applied to each option.
The B side: $120,000 invested today at 6% for 30 years → $120,000 × 5.74 ≈ $689,000. The A side, which the slogan always omits: option A frees up $857 every month. $857/month invested at 6% for 360 months → ≈ $861,000.
At identical assumed returns and these rates, the 20%-down buyer who invests the payment difference ends AHEAD by roughly $170,000 of future value.
At mid-6% mortgage rates, the invest-the-down-payment argument does not beat putting 20% down — if the choice is genuinely between the two. The honest case for the physician loan is different: most first-time attending buyers do not have $120,000, and saving it takes two to three years of $3,500–$4,000 monthly transfers while paying rent. The physician loan buys time, not investment outperformance. That reframe matters because it points the decision at your balance sheet instead of at a market forecast — and the value of buying now versus renting for the saving-up years is exactly the horizon question worked in the rent-versus-buy analysis.
The low-down route also has quieter legitimate uses for the freed cash than a brokerage account: a six-month emergency fund at attending spending levels, a 6.8% student loan balance (paying that down is a guaranteed return above the mortgage premium), premiums, and full retirement account contributions in your first eligible year. Cash directed at those is not chasing returns; it is buying resilience, which is precisely what a new attending balance sheet lacks.
The real risk is not the rate — it is negative equity in a forced move
The physician loan premium costs $857 a month; that is annoying but survivable. The risk that actually hurts people is different: owing more than a sale can net, in a year you did not plan to sell.
Example calculation
Assumptions, stated explicitly: option B ($600,000 loan at 6.74%); sale after 24 months; selling costs 8% of sale price (agent commissions near the 2026 average of 5.4% plus title, escrow, transfer, and concessions).
Loan balance after 24 payments ≈ $586,700 Sale at a flat $600,000: net proceeds after 8% costs = $552,000 Shortfall: $586,700 − $552,000 ≈ $34,700 — a check YOU write at closing. If the local market dips 5% to $570,000: net proceeds = $524,400; shortfall ≈ $62,300.
Option A never faces this: with $120,000 of day-one equity, even the 5%-dip scenario returns cash at closing. So the down-payment decision is coupled to the holding-period question — early attending job changes are common, and a meaningful share of first attending jobs end within two to three years. If your job is unproven, the 0%-down route stacks maximum leverage onto maximum horizon uncertainty at the same time.
Important
Zero down does not mean zero at risk. It means your risk is moved from a down payment you can see to a closing-table shortfall you cannot, payable in exactly the scenario — sudden job change, relocation, soft market — where your finances are already under strain. Price that scenario before admiring the $0 cash-to-close.
PMI is a rented bridge with a legal end date
The middle path — 10% down conventional with PMI — is routinely dismissed with "never pay insurance that protects the bank." But PMI has a property the physician loan premium lacks: a federally mandated expiration. Under the Homeowners Protection Act of 1998, on a single-family primary residence you may request cancellation when the balance reaches 80% of the home's original value (current on payments, good payment history), and the servicer must terminate PMI automatically when the balance is first scheduled to hit 78% of original value, if the loan is current.
On option C's schedule at 6.49%, amortization alone reaches the 80% threshold around month 94 — roughly 7.8 years — and the 78% automatic trigger near month 109. In practice the bridge is usually shorter: extra principal payments accelerate the schedule, and many servicers will cancel earlier based on a new appraisal showing appreciation, subject to their seasoning rules — ask; the appraisal path is servicer policy, not HPA right. Meanwhile the physician loan's 0.25-point premium runs the full life of the loan unless you refinance, and a refinance is a bet that future rates cooperate.
Compare the two costs the way they actually behave: PMI on option C is about $225 a month with a legal off-switch around year eight at worst; the illustrative physician-loan premium is $857 a month against option A, or roughly $478 a month against option C, with no off-switch. With strong credit and 10% available, cheap PMI frequently beats the premium — which is why the middle path deserves a same-day quote instead of a slogan.
The decision rule: your liquidity position picks the loan
After the arithmetic, the choice compresses into a rule you can apply in five minutes:
| Your position | Route |
|---|---|
| 20% down available AND six months of attending-level expenses left over AND no debt above ~6% | A: 20% down conventional — at 2026 rates the math favors it outright |
| 10–19% available with reserves intact, strong credit score | C: get PMI quotes; cheap PMI at a conventional rate often beats the physician premium |
| Down payment would drain reserves, or you carry higher-rate debt, or closing must precede your start date | B: physician loan — pay the premium, keep the resilience |
| Job under one year old and a move is plausible | Rerun rent versus buy before choosing any of the three |
Note what is absent from the rule: a market forecast. Every branch is decided by facts you already possess — cash, reserves, debt rates, credit, job tenure. The one input to verify fresh is pricing: get all three structures quoted on the same day, as Loan Estimates, and let the live premium and live PMI quote replace the illustrative figures used here.
Quick takeaway
If the 20% is truly spare, put it down. If it is not spare — if it would strip your emergency fund, sit atop 6.8% student debt, or simply not exist yet — the physician loan converts a multi-year savings delay into an $857-a-month decision you can end at the first good refinance window. The middle path wins more often than either camp admits, but only for buyers whose credit makes PMI cheap.
Common questions
Is avoiding PMI always worth it?
No — that slogan predates the current numbers. PMI at 0.5% on a $540,000 loan is $225 a month and legally terminates; a 0.25-point physician-loan premium on a $600,000 balance is more per month and never terminates on its own. With a credit score near the top band, quote the PMI path before assuming the physician loan wins. With a weaker score, PMI can run toward 1.5% and the physician loan wins easily. Your credit report decides; the category does not.
Can I just refinance out of the physician loan premium later?
You can refinance whenever the numbers work, and once you have 20% equity you qualify conventionally. But a refinance costs 2% to 3% of the loan in fees and requires future rates at or below today's — a condition outside your control. Take the physician loan expecting to keep it; treat a good refinance window as a bonus, not a plan.
I have the $120,000, but I also have student loans at 6.8%. Down payment or debt?
At those numbers the debt argument is strong: paying 6.8% debt is a guaranteed, tax-free return higher than the mortgage rate itself. A common structure is the physician loan with 0% to 5% down, the $120,000 aimed at the student balance, and a revisit once the debt is gone. If the student debt is federal and you are pursuing , the calculus changes entirely — do not prepay loans you intend to have forgiven.
Does a bigger down payment help my offer get accepted?
Sellers care about certainty of closing, not your loan-to-value. A physician loan from a program with strong local closing history, a clean pre-approval, and a solid earnest-money deposit competes fine. In a bidding war, the levers are price, contingencies, and closing timeline — the down payment is mostly invisible to the seller.
What to do next
- Write down your liquidity position: cash available, months of attending-level reserves it leaves, and the rate on every debt you carry. The table above turns this into a provisional answer in five minutes, before anyone pulls credit.
- Confirm your holding-period confidence against the rent-versus-buy triggers — if the job is under a year old, resolve that question first.
- Get all three structures quoted on the same day as official Loan Estimates: 20% conventional, 0–5% physician program, 10% conventional with a real PMI quote.
- Replace this article's labeled assumptions with your live numbers — actual premium, actual PMI, current PMMS week — and rerun the monthly and lifetime lines.
- Size the payment against the how much house budget; the best loan structure cannot rescue an oversized price.
- Choose the branch of the decision rule that matches your balance sheet, and keep the runner-up quote for negotiating.
The three routes differ by hundreds of dollars a month and six figures over a lifetime, yet the right one is determined by your own liquidity, not by anyone's slogan — and the framework works with or without any particular platform behind it. Rates here are dated to the week of July 9, 2026; verify the current week before you lock. This is education, not individualized financial advice.