Is It Worth Putting 20% Down?

The short answer: 20% is not a requirement and it is not magic, but it is a real threshold — it's generally where mortgage insurance stops being part of the payment. Whether getting there is worth it depends on what that cash would otherwise do and how long you'll keep the loan. Sometimes it's clearly right. Sometimes it drains a reserve you'll need in month four. Price it both ways before deciding.

I'm Jeff Moran, a mortgage broker in Bluffton, South Carolina, originating since 1996. The 20% rule is the most repeated piece of mortgage advice in the country and one of the least examined. It bundles three different questions into one number, and pulling them apart usually changes the answer.

What the down payment actually buys you

Three separate things, and they don't move together.

1. A smaller loan. Obvious, and the least interesting. Less borrowed means a smaller payment, spread over the life of the loan.

2. Better pricing, in steps. Loan-to-value is one of the adjustments that produces your rate, and like the others it moves in breakpoints rather than on a slope. Additional cash that crosses a boundary can matter. The same cash added while you're already comfortably inside a tier changes nothing. How that machinery works.

3. Getting out of mortgage insurance. This is the one people actually mean by "20%," and it's the biggest single item. Below that threshold, conventional loans generally carry mortgage insurance as part of the monthly payment.

Those three don't arrive together, which is why "just put 20% down" is advice about only one of them.

Mortgage insurance is not permanent, and that changes the math

Here's the piece that gets left out of the standard advice.

Conventional mortgage insurance generally comes off. As the balance drops and value holds or rises, there's a point where it can be removed, and a further point where it's supposed to come off automatically. It is a temporary cost, not a life sentence.

That matters enormously for the decision, because it reframes the question. You're not choosing between "pay mortgage insurance forever" and "put down 20%." You're choosing between paying it for a while and spending cash today to avoid it. Those are very different trades, and the second one is only obviously better if the cash has nothing better to do.

Worth knowing: FHA treats this differently, and on many FHA loans the mortgage insurance behaves quite differently over the life of the loan. That's one of the real decision points between programs rather than a detail. FHA explained.

When the cash is worth more somewhere else

Reasons I've watched clients regret hitting 20%:

They emptied the reserves. Closing wipes out more than the down payment — there are closing costs, prepaid taxes and insurance, and the escrow account's first deposit. What's actually on that list. A buyer who put every dollar into the down payment and then met a water heater in month three is in a worse position than one who put down less and kept a cushion.

They needed it for the house itself. Furniture, a fence, the immediate repair the inspection surfaced. Cash after closing has real value.

They could have bought the rate instead. The same money applied as points can buy a lower rate for the whole loan term. Whether that beats a larger down payment is a break-even question with an actual answer — here's how that math works — and the answer depends on how long you keep the loan.

They delayed a year to save it. In the meantime rent was paid, the market did whatever it did, and the loan they eventually got wasn't the one they'd modeled. Waiting has a cost that never shows up on the spreadsheet.

When 20% genuinely is the right answer

• You have it comfortably, with reserves left over afterward.
• You're keeping the loan and the house for a long time, so avoided mortgage insurance compounds.
• You're near a pricing breakpoint anyway, so the same dollars are doing two jobs.
• You want the lowest payment you can get and the cash has no better use.

That's a real set of circumstances and it describes plenty of people. The point isn't that 20% is wrong — it's that it should be a conclusion, not an assumption.

How mortgage insurance actually comes off

Since the whole 20% debate turns on this, it is worth knowing the mechanics rather than the folklore.

There are generally two routes. One is a request you make once the balance has fallen far enough relative to the original value — that one requires you to ask, and lenders are not in the habit of volunteering it. The other is automatic termination further along, which happens without you doing anything.

Two practical consequences.

It is often on you to ask. Plenty of people carry mortgage insurance for a year or more past the point they could have requested removal, simply because nobody told them and the payment never changed. Put a reminder in your calendar at closing.

Appreciation can count, but the rules differ. Where a home has gained value, a new appraisal may support removal earlier than the amortization schedule alone would. Whether that is available, and what it requires, varies by loan and by servicer, so it is a question to ask rather than to assume.

If you are choosing between 15% down with mortgage insurance and 20% down without, the honest comparison is not "forever versus never." It is "this cost for some number of years versus that cash today," and the number of years is knowable rather than mysterious.

An illustration, so the trade is visible

Numbers below are invented to show the shape. They are not a quote.

Say you have $80,000 available and you're looking at a $400,000 house.

Option A: put all $80,000 down. 20% down, no mortgage insurance, no cash left.

Option B: put $60,000 down. 15% down, mortgage insurance in the payment, $20,000 still in the bank.

Option A has the lower payment. That's real and it's the part everyone sees.

Option B has a cushion that covers the inspection surprise, the appraisal gap, the first year of a house doing what houses do — and mortgage insurance that will eventually come off anyway.

Which is better isn't a matter of principle. It depends on how much of that $20,000 you'd actually need, how long you're staying, and where the pricing breakpoints fall for your file. That's arithmetic, and it takes about a minute to run both.

What to do

Don't decide this from a rule of thumb. Price it: 5%, 10%, 15%, 20%, with the mortgage insurance in the payment where it applies and the cash-left-over shown honestly.

Run it both ways — no credit pull, no account — and look at the two payments next to the two bank balances. The right answer is usually obvious once both are on the screen, and it is not always the one the rule of thumb predicts.

Nothing here is a loan approval, a denial, or a commitment to lend. Program rules and pricing change.

Common questions

Do I need 20% down to buy a house?

No. Conventional loans are available with considerably less, and FHA and VA have their own structures — VA generally requires no down payment for eligible clients. What 20% typically does on a conventional loan is remove mortgage insurance from the monthly payment, which is a cost question rather than an eligibility one.

Does a bigger down payment lower my interest rate?

Sometimes, and in steps rather than smoothly. Loan-to-value is one of the adjustments that produces your rate, and it moves at breakpoints. Cash that crosses a threshold can improve pricing meaningfully; the same cash added within a tier may not change the rate at all.

Does mortgage insurance ever go away?

On conventional loans it generally does. As the loan balance falls relative to the home's value there is a point where it can be requested for removal, and a further point where it is supposed to terminate automatically. FHA treats mortgage insurance differently, which is one of the genuine decision points between the two programs.

Is it better to put more down or buy down the rate?

It depends on how long you keep the loan. Points buy a lower rate for the life of the loan and take time to break even; a larger down payment reduces the balance and may remove mortgage insurance. Both are worth pricing against each other on the same scenario rather than choosing by instinct.

How much cash do I need besides the down payment?

Closing costs, prepaid property taxes and homeowner's insurance, and the initial escrow deposit where one is used. Budgeting only the down payment is one of the most common reasons a buyer arrives at closing short of funds, and it is entirely avoidable by pricing the full cash-to-close early.

Should I wait and save for a larger down payment?

Sometimes, but waiting has costs that rarely appear in the comparison — rent paid in the meantime, and a market that may move in either direction. The honest way to decide is to price buying now against a realistic version of buying later, including what the cash cushion looks like in each case.