A $350,000 house with 3% down means $10,500 at the closing table instead of the $70,000 a 20% down payment would demand. That gap is why the 3% conventional loan gets so much attention, and why so many buyers are surprised to learn it has rules attached. The program exists. It is not a gimmick or a teaser rate. But it is narrower than most people assume, and the monthly cost of financing 97% of a home is not the same as the cost of financing 80%.
Here’s what the program is, who actually gets approved, and where the money goes beyond that headline down payment number.
What a 3% Down Conventional Loan Actually Is
Fannie Mae and Freddie Mac both buy mortgages written at 97% loan-to-value, which means the lender funds 97 cents of every dollar of the purchase price and you cover the last three. The loans are conventional, meaning they aren’t government-insured like FHA or VA products. They’re backed by the agencies that package them into securities, and they carry standard conventional underwriting: automated approval through Fannie’s Desktop Underwriter or Freddie’s Loan Product Advisor, a documented income history, and a credit profile the system will accept.
The three versions you’ll run into
- Conventional 97: Fannie Mae’s standard 3% program. At least one borrower must be a first-time homebuyer, defined as someone who hasn’t owned a home in the past three years. One-unit primary residence only.
- HomeReady (Fannie Mae) and Home Possible (Freddie Mac): also 3% down, no first-time buyer requirement, but income is capped at 80% of the area median income. A short online homebuyer education course is required.
- Lender-specific 3% programs: many banks and credit unions offer their own 97% LTV products, sometimes with better pricing for buyers in certain ZIP codes or professions. Terms vary widely, so they’re worth asking about even if you don’t fit HomeReady.
All three are capped by the conforming loan limit, which sits at $806,500 for a single unit in most of the country. Above that, you’re in jumbo territory and the 3% option usually disappears.
The Numbers Underwriters Actually Approve On
Credit is the first gate. Most lenders want a 620 minimum for a 97% LTV conventional loan, and many add their own overlays that push the real floor to 640 or 660. That’s a lower bar than you might expect, but the score does more than get you in the door. It prices your mortgage insurance, which we’ll get to. If you’re hovering near the threshold, it’s worth understanding what credit score you actually need for a conventional loan before you start house hunting, because a 20-point difference can move your payment by $80 a month.
Debt-to-income ratio is the second gate. Most 3% conventional approvals land at or under 45% of gross monthly income going to housing plus all other minimum payments. With strong credit and a few months of reserves in the bank, automated underwriting will sometimes stretch to 50%. Above that, you need compensating factors that a first-time buyer rarely has.
Where the income cap bites
The HomeReady and Home Possible income limits are the most common source of confusion. In a mid-sized metro, 80% of area median income might be $62,000 for a one-person household and $71,000 for two. Earn $74,000 and you’re out of those programs, though you may still qualify for the standard Conventional 97 if you’re a first-time buyer. Lenders calculate this against all borrowers on the loan combined, and the limit changes by county.
Mortgage Insurance: The Cost of Financing 97%
Put 3% down and you’ll pay private mortgage insurance until the loan balance drops to 80% of the home’s original value. At 97% LTV, the annual premium typically runs between 0.55% and 0.90% of the loan amount, depending on credit score and how the loan is structured.
On a $339,500 loan against a $350,000 purchase, that works out to roughly $155 to $255 a month. Call it $200 as a working number. It’s not throwaway money, but it buys you something specific: you keep $59,500 in your pocket at closing compared with a 20% down purchase.
The good news is that this insurance ends. You can request removal once the balance hits 80% of the original value, and the servicer must drop it automatically at 78%. On a $350,000 purchase with typical appreciation and principal payments, that’s usually somewhere between year five and year eight. Compare that to FHA, where mortgage insurance on a 3.5% down loan lasts for the entire 30-year term.
The Cash You Need That Isn’t the Down Payment
Closing costs on a conventional loan generally run 2% to 5% of the purchase price. On a $350,000 house, budget $7,000 to $17,500 for lender fees, title insurance, appraisal, recording, prepaid interest, and the first year’s homeowner’s insurance. That’s money on top of your $10,500.
One advantage of staying conventional: seller concessions. At 97% LTV, the seller can credit you up to 3% of the purchase price toward your closing costs, which is $10,500 on that same house. Ask for it in the offer. It doesn’t reduce the seller’s net as much as buyers fear, and it can wipe out most of your out-of-pocket closing costs.
Reserves are the other quiet requirement. Many 3% conventional approvals ask for zero to two months of full housing payments in reserves after closing. Two months on a $2,400 payment is $4,800 sitting in an account that the underwriter will verify twice.
3% Conventional vs. 3.5% FHA: The Seven-Year Math
FHA needs 3.5% down, which is $12,250 on the $350,000 house, plus a 1.75% upfront mortgage insurance premium of about $5,900 that almost everyone finances into the loan. Then there’s annual mortgage insurance of 0.55% on a 3.5% down loan, roughly $156 a month, and it never goes away unless you refinance out. The FHA down payment rules and the cash they hide are worth reading in full before you decide, because the upfront premium gets buried in the loan balance where it quietly costs interest for three decades.
What FHA gives you in return is flexibility. Credit scores down to 580 qualify for 3.5% down, and 500 to 579 can still work at 10% down. Debt-to-income tolerances are looser, and non-traditional income sources are treated more generously. If your profile is clean, conventional is usually the cheaper loan over seven years. If your credit is rough or your income documentation is complicated, FHA may be the only realistic path.
Don’t decide on the down payment percentage alone. The right way to compare mortgage loan types is to line up the full monthly payment, the total cash to close, and the balance at year seven and year ten, side by side, from actual Loan Estimates.
Where 3% Down Applications Fall Apart
- Gift funds without a paper trail. The entire 3% can be a gift from a relative on Conventional 97 and HomeReady. Underwriters want a signed gift letter, proof the donor had the money, and a bank statement showing it landing in your account. A $10,500 transfer from a parent with no explanation will stall the file.
- Non-warrantable condos. Conventional 97 requires a warrantable condo project. If the building is investor-heavy, has pending litigation, or is a new conversion, the loan dies and your earnest money gets complicated.
- Rate pricing at 97% LTV. Loan-level price adjustments hit high-LTV loans. Expect conventional 97 to price slightly worse than the same borrower at 80% LTV, maybe an eighth to a quarter point in rate.
- Self-employment income in a down year. Two years of returns are required, and the qualifying figure is the net, not the gross.
- Undisclosed debt. A new car loan that appears on the final credit refresh can push your DTI over the limit a week before closing. Don’t finance furniture until the keys are in your hand.
Making a 3% Down Offer Stick
In a competitive market, a 3% down offer reads as risk to a seller, and it’s worth managing that perception directly. A fully underwritten pre-approval, where the lender has already reviewed your income documents and run the file through automated underwriting, carries far more weight than a pre-qualification letter. Ask for it by name.
Appraisal risk is the other pressure point. With 3% down, there’s almost no equity cushion if the appraisal comes in low, and a low appraisal means you either bring extra cash or renegotiate. Budgeting a $5,000 to $10,000 cushion above your down payment and closing costs gives you room to cover a modest appraisal gap without derailing the purchase.
Finally, know your loan limits and your lender overlays before you tour homes. A buyer pre-approved at 620 credit and a 45% DTI in a county where HomeReady’s income cap is $68,400 has a very clear box to shop inside. Stay in that box, keep your documents clean, and the 3% conventional loan does exactly what it promises: it gets you into a home years earlier than saving a 20% down payment would.