Mortgage Down Payment and How Much You Really Need

Many buyers delay for years because they believe a mortgage down payment has to be 20 percent of the price. On a $350,000 home that is $70,000, and saving it can feel impossible. The real minimum is often far lower, but putting down less changes your monthly payment, your insurance costs, and how much cash you have left after closing.

I work with buyers on this decision every week. Here is how the numbers actually work and how to pick an amount you will not regret two years later.

The real minimum mortgage down payment by loan type

The 20 percent figure is not a rule. It is the point at which most conventional lenders stop requiring private mortgage insurance. Below that, you can still buy, you just pay for the lender's extra risk.

Programs and fees change, and individual lenders set overlays on top of the official minimums. Treat the table as a starting point for a conversation with your loan officer, not a quote.

What a smaller down payment costs you each month

Every dollar you do not put down is a dollar you borrow, with interest, for up to 30 years. On a $350,000 purchase at a 6.5 percent rate, principal and interest alone looks roughly like this:

• 20 percent down, $280,000 loan: about $1,770 per month.
• 10 percent down, $315,000 loan: about $1,990 per month, plus PMI.
• 5 percent down, $332,500 loan: about $2,100 per month, plus PMI.
• 3 percent down, $339,500 loan: about $2,145 per month, plus PMI.

Private mortgage insurance typically runs between 0.3 and 1.5 percent of the loan amount per year, depending mostly on your credit score and how much you put down. For a buyer with a 720 score and 5 percent down, $120 to $180 a month is a reasonable expectation. Add that to the gap above and the difference between 5 and 20 percent down can reach $450 a month.

That number is not a reason to wait by itself. It is a cost you should see clearly before you choose.

Why putting down 20 percent is often the wrong move

Here is where I disagree with the common advice. Draining your savings to hit exactly 20 percent can leave you more fragile than a buyer who put down 10 percent and kept a solid cushion.

New owners face costs nobody budgets for. A water heater fails in month four. The roof inspector's "a few more years" turns into one winter. Moving, furniture, and small repairs easily eat $5,000 to $10,000 in the first year. If all your cash went into the house, those costs land on a credit card at 24 percent interest, which is far worse than PMI.

Home equity is also hard to reach. You cannot pay a medical bill with your kitchen. Getting money back out means a home equity loan or a refinance, each with fees and approval risk at exactly the moment your finances are under strain.

My rule of thumb for clients: after the down payment and closing costs, keep at least three to six months of total living expenses in cash. If hitting 20 percent breaks that rule, put down less and accept the PMI for now. Conventional PMI can usually be removed once you reach about 20 percent equity, and the cash you kept is what protects you until then.

The cash you need beyond the down payment

The down payment is the headline number, but lenders and title companies will ask for more at the closing table. Plan for these:

1. Closing costs. Usually 2 to 5 percent of the loan, so $7,000 to $17,000 on a $340,000 loan. Lender fees, title insurance, appraisal, and recording charges are the main pieces.
2. Prepaid items. Several months of property tax and a full year of homeowners insurance often go into escrow upfront.
3. Earnest money. Commonly 1 to 3 percent of the price, paid when your offer is accepted. It counts toward the down payment, but you need it in cash early.
4. Reserves. Some loans, especially for second homes or lower credit scores, require two months or more of payments sitting in your account after closing.

A buyer with $25,000 saved might assume they can put down $25,000. In practice they may only be able to put down $12,000 once closing costs and reserves are covered. Running this math early prevents the stress of finding out at the last minute, which is the same lesson behind why your pre-approval amount is not your real budget.

Where the down payment money can come from

Lenders care about the source of your funds almost as much as the amount. Underwriters review two months of bank statements and will ask about any large deposit that is not your regular pay. Money that suddenly appears without a paper trail can delay or derail approval, as explained in what underwriters check that buyers never see.

Acceptable sources usually include:

• Savings and checking balances that have been in place at least 60 days.
• Gift funds from family, documented with a signed gift letter and proof of transfer.
• Down payment assistance programs run by state or city housing agencies, some offering grants of $5,000 to $15,000 for first time buyers.
• Withdrawals or loans from retirement accounts, which are allowed but carry tax and long term growth costs worth weighing carefully.
• Proceeds from selling a current home, shown on the settlement statement.

Cash kept at home and deposited right before applying is the classic problem. If you keep cash, deposit it months before you shop.

How to choose your number

Work backward rather than forward. Start with the monthly payment you can comfortably carry, including taxes, insurance, and PMI. Subtract closing costs and your emergency cushion from your savings. Whatever remains is your realistic down payment, and the loan type follows from there. If you are still building that cushion, the budgeting habit that decides if you are ready to buy is the place to start.

If that number is under 5 percent, look at FHA or first time buyer conventional programs. If it lands between 10 and 20 percent, compare PMI quotes, since the difference between 10 and 15 percent down can cut PMI by a third.

Frequently asked questions

Can I buy a house with 3 percent down?

Yes. Several conventional programs for first time buyers accept 3 percent down, and FHA loans accept 3.5 percent. You will pay mortgage insurance, and your credit score and debt levels still need to meet the lender's standards.

Is it better to put more down or keep savings?

For most buyers, keeping three to six months of expenses in cash matters more than reaching 20 percent down. PMI is a known, removable cost. Running out of cash after a major repair is far more expensive and stressful.

Does a bigger down payment get a lower interest rate?

Often, yes. Lenders price conventional loans partly on loan to value, so moving from 5 to 20 percent down can lower your rate slightly and removes PMI. The improvement is usually modest, so compare it against keeping that cash available.