Five percent down on a $400,000 house is $20,000. That’s a number plenty of buyers can actually reach, which is why the 5% down conventional loan has quietly become one of the most common ways people get into a first home. The question that always follows is the same one: how much more am I paying in interest for the privilege?
The honest answer is less than most people fear, and more than the online calculators suggest. Here’s the breakdown, with actual numbers.
The rate penalty for 5% down is smaller than the headlines suggest
On a $400,000 purchase with 5% down, you’re borrowing $380,000 at 95% loan-to-value. Fannie Mae and Freddie Mac price that risk through loan-level price adjustments, or LLPAs, which are charged as upfront points rather than a separate fee. Moving from 80% LTV to 95% LTV typically adds somewhere between 0.375 and 0.75 points, depending on your credit score.
Half a point on a $380,000 loan is $1,900. Rolled into the rate instead of paid in cash, that translates to roughly a quarter of a percentage point. So a borrower who’d get 6.625% at 20% down might see 6.875% at 5% down. Real money over 30 years, but not the two-point gulf some buyers imagine.
What most people miss is that the spread between the cheapest and most expensive lender on the same day is often wider than the spread between 5% and 20% down. Two quotes, same borrower, same property, can differ by 0.5% in rate if one lender is loading up the margin. That’s why shopping matters more than the down payment percentage itself.
PMI is the bigger line item, and it isn’t permanent
Private mortgage insurance is where the real monthly difference lives. On that same $380,000 loan with a 740 score, borrower-paid PMI typically runs about 0.5% to 0.8% of the loan annually. At 0.58%, you’re looking at $184 a month on top of principal and interest.
Side by side, the monthly gap looks like this. At 5% down and 6.875%, principal and interest is about $2,496, plus $184 in PMI, for $2,680 total. At 20% down and 6.625%, you’re borrowing $320,000 with P&I of roughly $2,049 and no PMI. That’s a $631 difference, though $447 of it is simply because you’re borrowing $60,000 more.
Three ways to make PMI go away
- Request removal at 80% LTV. Once you’ve paid the balance down to 80% of the home’s original value, you can ask the servicer to cancel it. Most require a two-year payment history and a clean record.
- Automatic termination at 78%. Federal law requires servicers to drop PMI automatically when the balance hits 78% of the original value, based on the original amortization schedule.
- Reappraise if values climbed. If your market ran up, a new appraisal can get you under 80% LTV years ahead of schedule. Expect to pay $500 to $700 for it, which is often two to three months of PMI.
In a typical 5% down scenario with normal appreciation, most borrowers shed PMI somewhere between year four and year seven. Treat it as a temporary cost, not a permanent one, and budget accordingly.
Your credit score outruns your down payment
Here’s the part that surprises people. The gap between a 760 score and a 640 score on a 95% LTV loan is roughly 1.25 percentage points in rate, plus a bigger PMI factor. Adjusting your down payment from 5% to 10% might buy you an eighth of a point. Adding 80 points to your credit score can buy six times that.
If you’re sitting at 640 and have six months before you need to buy, the payoff from paying down a credit card balance or disputing an old collection is usually far larger than scraping together another $20,000 in down payment. The pricing tiers at 760 and above are genuinely different from what you’ll see at 680. Our breakdown of what a 760+ score really buys you shows the size of that gap in dollars, and it’s worth reading before you assume a bigger down payment is your best lever.
On the other end, borrowers in the 620 to 660 range often get steered toward FHA whether or not it fits them, because FHA pricing is more forgiving of weak credit. Run both scenarios. Sometimes FHA wins, sometimes conventional with a higher rate and cancellable PMI wins by a wide margin over seven years.
Loan size quietly moves your rate too
Down payment percentage is only half the pricing story. Loan amount matters, and not just at the jumbo threshold. A $250,000 loan and a $750,000 loan don’t price the same even when both are conforming and both sit at 95% LTV, because of how lenders layer their own margins and because larger loans carry different risk weights. Our piece on why $250K and $750K don’t price the same digs into where those adjustments come from. If you’re buying at the lower end of your market with 5% down, you may be paying a small-loan premium you didn’t know existed.
One practical consequence: at 95% LTV, seller concessions are capped at 3% of the purchase price. Buyers at 20% down can negotiate up to 9%. If you’re in a soft market and hoping to get the seller to cover closing costs, that cap is a real constraint on your offer strategy.
Down payment assistance can close most of the gap
State housing finance agencies, city programs, and some credit unions offer second liens or forgivable grants that cover 3% to 5% of the purchase price. Stacked with your own 5%, that can push you to 8% or 10% down without changing your savings timeline. Some programs require homebuyer education, income limits, or a minimum 640 score. Others are silent seconds with 0% interest that only come due when you sell or refinance.
These programs are real, and they’re underused because loan officers don’t always mention them. The catch is layered fees, which is exactly the trap described in how low-income buyers get quietly marked up. Ask directly whether the assistance program comes with a rate bump, because some do.
When 5% down is the wrong call
Stretching to 5% down makes sense when it gets you into a home you’ll keep for at least five years and leaves you with three to six months of reserves. It stops making sense in a few specific situations.
- You’d have less than two months of mortgage payments in savings after closing. A single repair can turn a tight budget into a default.
- The PMI pushes your debt-to-income ratio past 45%, which narrows your lender options and usually costs you on rate.
- You’re buying in a market where sellers routinely get five or more offers. A 5% down offer is perfectly financeable, but it can lose to a 20% down offer at the same price, and you should know that going in.
Get four quotes at four down payment levels on the same day
Before you fall in love with a house, ask one lender for Loan Estimates at 5%, 10%, 15%, and 20% down on the same property, same credit pull, same lock period. Then take the 5% scenario to three other lenders and compare the rate plus total origination charges in Box A, not the APR alone.
The pattern usually looks like this: the first 5% to 10% of equity improvement saves very little, the jump from 15% to 20% saves a lot because PMI disappears entirely, and the lender-to-lender variance is bigger than both. If you’re close to 20%, saving a bit longer or using a second lien to bridge the gap can be the best value in the whole equation. If you’re not close, 5% down with a well-shopped rate and a plan to remove PMI at year three or four is a perfectly sound way to buy. Read what extra equity actually buys you at 20% down before you decide the gap is worth chasing, because for a lot of buyers it isn’t.