Down Payment Calculator

Understanding the Down Payment

A down payment calculator shows the two numbers at the heart of any home purchase: how much cash you'll put down, and how much you'll need to borrow. The down payment percentage you choose ripples through everything — your loan size, your monthly payment, whether you'll owe mortgage insurance, and how much house you can afford — which is why getting it right is one of the most consequential decisions in buying a home.

How it actually works

Enter the home price and your down payment percentage. The calculator computes the down payment amount and the resulting loan you'll need. On a $400,000 home with 20% down, you'd put down $80,000 and borrow $320,000. Drop to 10% down and your cash requirement halves to $40,000, but your loan rises to $360,000 — and you'll likely owe private mortgage insurance on top.

The deeper context most people miss

The 20% threshold is the number that matters most, because it's the line at which private mortgage insurance (PMI) disappears. Below 20% down, most conventional lenders require PMI — insurance that protects the lender, not you, adding $100-300 or more to your monthly payment until you build 20% equity. Above 20%, no PMI. This makes the down payment decision a genuine tradeoff: a smaller down payment preserves cash and lets you buy sooner, but costs you PMI and a bigger loan; a larger down payment eliminates PMI and shrinks the loan, but ties up more cash upfront.

Why 20% is the magic number

The 20% down payment threshold looms large in home buying because it's the point at which private mortgage insurance is no longer required on most conventional loans, and understanding this explains a lot of home-buying strategy. Lenders require PMI on loans where the borrower puts down less than 20% because these loans are riskier — the borrower has less equity, so if they default and the home is foreclosed and sold, the lender is more likely to lose money. PMI is insurance that covers the lender against that loss, and the borrower pays for it, typically $100-300+ a month depending on the loan size and down payment, until they reach 20% equity (at which point it can usually be removed). This creates the significance of the 20% threshold: put down 20% or more and you avoid PMI entirely, saving that monthly cost; put down less and you pay PMI, sometimes for years, until your equity grows through payments and appreciation. PMI is a real cost that buys you nothing — it protects the lender, not you — so avoiding it by reaching 20% down saves potentially thousands of dollars. However, 20% is a large sum (on a $400,000 home, it's $80,000), and requiring it would keep many buyers out of the market for years while they save, during which home prices and rents might rise. This is the core down payment tension: 20% avoids PMI and reduces the loan but demands a lot of cash and delays purchase, while lower down payments enable buying sooner and preserve cash but add PMI and a larger loan. There's no universally right answer — it depends on your cash situation, how much PMI would cost, local market conditions, and whether buying sooner (before prices rise) outweighs the PMI cost. But understanding why 20% matters lets you make the tradeoff deliberately rather than defaulting to a number.

A third example: buy now with less down, or wait and save 20%?

A common real dilemma: a buyer can afford 10% down now, or could save for another two to three years to reach 20%. Which is better? The 10%-now path means a $400,000 home with $40,000 down, a $360,000 loan, and PMI of perhaps $150 a month until they reach 20% equity — say, four to five years of PMI totaling around $8,000, plus a slightly larger loan and its interest. The wait-and-save path avoids PMI entirely but delays buying by two to three years, during which two things happen that often favor buying sooner: home prices may rise (if the $400,000 home appreciates 4% a year, it costs about $43,000 more after two and a half years, and the 20% down payment target rises with it, becoming a moving goal), and the buyer pays rent throughout the waiting period (perhaps $2,000 a month, or $60,000+ over two and a half years, building no equity). So waiting to avoid $8,000 of PMI can cost far more in higher home prices and rent paid than the PMI would have. On the other hand, if the market is flat or falling, or if PMI is unusually expensive, or if the buyer needs the extra time to also build an emergency fund, waiting can make sense. The calculator shows the loan and down payment for each scenario, making the cash and loan implications concrete, but the full decision weighs PMI cost against the risk of rising prices and the rent paid while waiting. For many buyers in appreciating markets, buying sooner with PMI and refinancing or dropping PMI later beats waiting years to hit 20%, because the PMI cost is smaller than the price appreciation and rent they'd face by waiting — but it genuinely depends on the market and the individual's finances, which is exactly why running the numbers matters.

Deciding how much to put down

A buyer with substantial savings is deciding how much of it to use as a down payment. More isn't automatically better, and the decision involves several tradeoffs the calculator helps clarify. Putting down more reduces the loan, the monthly payment, and the total interest paid over the life of the loan, and reaching 20% eliminates PMI — all real benefits. But putting down more also ties up cash that could serve other purposes: maintaining an emergency fund (essential — never drain your reserves for a down payment, since a home comes with unexpected costs), covering closing costs and moving expenses (which are substantial and separate from the down payment), leaving a cushion for immediate repairs or furnishing, or investing elsewhere for potentially higher returns than the mortgage rate. The sensible approach is usually to put down enough to reach 20% and avoid PMI if you comfortably can while keeping a solid emergency fund and covering all the other costs of buying — but not to drain every dollar into the down payment, because being house-rich and cash-poor is risky. If reaching 20% would leave you without reserves, it's often better to put down less, accept PMI temporarily, and keep the cushion. Conversely, putting down far more than 20% (say 40%) reduces your loan and payment further but ties up a lot of cash in home equity, which is illiquid and earns no return beyond the mortgage interest you avoid — money that might do better invested, depending on your mortgage rate and risk tolerance. The calculator shows the down payment and loan for any percentage, letting you see the cash-versus-loan tradeoff at each level, so you can choose the down payment that balances avoiding PMI, keeping adequate reserves, and not over-committing cash to illiquid home equity.

Down payment sources, assistance, and loan types

Beyond deciding how much to put down, buyers should understand where down payments can come from and how different loan types change the requirements, because the '20% ideal' isn't the only path. Many loan programs allow much smaller down payments: conventional loans can go as low as 3-5% down (with PMI), FHA loans allow 3.5% down with more flexible credit requirements (though they carry their own mortgage insurance), and VA loans (for eligible veterans and service members) and USDA loans (for eligible rural buyers) can require zero down payment. These low-and-no-down-payment options make homeownership accessible sooner, though they involve mortgage insurance or funding fees and larger loans. Down payment sources can include savings, of course, but also gifts from family (allowed by many loan programs with proper documentation), certain retirement account withdrawals or loans (with caveats and potential penalties), and — importantly — down payment assistance programs, which many states, cities, and nonprofits offer to help buyers (especially first-time and lower-income buyers) with grants or low-interest loans toward the down payment and closing costs. These assistance programs are underused simply because many buyers don't know they exist. The choice of loan type interacts with the down payment: an FHA loan might let you buy with 3.5% down but comes with mortgage insurance that (unlike conventional PMI) can be harder to remove, while a conventional loan with PMI lets you drop the insurance once you reach 20% equity. The right combination depends on your down payment capacity, credit, eligibility for special programs, and long-term plans. The calculator computes the down payment and loan for any percentage you enter, but knowing the full landscape — low-down loan options, down payment assistance, and how loan types affect insurance — helps you find the path to homeownership that fits your actual cash situation rather than assuming you must have 20% saved.

Variations: conventional, FHA, VA, USDA, and jumbo loans

The down payment you need depends heavily on the loan type, and the options range far beyond the traditional 20%. Conventional loans (the standard, not government-backed) can go as low as 3-5% down for qualified buyers, requiring PMI below 20% down that can be removed once you reach 20% equity — the most common path, flexible but requiring decent credit. FHA loans (government-insured, aimed at broader access) allow 3.5% down with more lenient credit requirements, making them popular with first-time and lower-credit buyers, but they carry mortgage insurance premiums that, unlike conventional PMI, often last the life of the loan unless you refinance. VA loans (for eligible veterans, service members, and some surviving spouses) offer a remarkable benefit: zero down payment and no PMI, with a one-time funding fee instead — one of the best deals in home lending for those who qualify. USDA loans (for eligible buyers in designated rural areas, with income limits) also allow zero down. Jumbo loans (for homes above conventional loan limits) typically require larger down payments (often 10-20%+) and stricter qualification, since the loan amounts are bigger and riskier for lenders. Each type trades down payment size against mortgage insurance, credit requirements, eligibility, and cost structure: the zero-down VA and USDA loans are ideal for the eligible, FHA opens the door with low down payments but lasting insurance, conventional offers the cleanest path to dropping PMI, and jumbo demands more down for expensive homes. This calculator computes the down payment and loan for any percentage, letting you model any of these scenarios, but choosing the right loan type — based on your eligibility, credit, down payment capacity, and the home's price — is a key part of the down payment decision, since the loan type determines both how little you can put down and what insurance or fees come with doing so.

Deciding your down payment strategically

Approach the down payment as a deliberate tradeoff rather than defaulting to a number, because it shapes your loan, payment, PMI, and how soon you can buy. Understand the pivotal 20% threshold: reaching it eliminates private mortgage insurance (which protects the lender, not you, and adds $100-300+ monthly until you have 20% equity), so putting down 20% avoids a real cost, while putting down less means paying PMI temporarily. But weigh this against your full situation. Never drain your emergency fund or leave yourself cash-poor to reach 20% — maintaining reserves is essential, since homes bring unexpected costs, and it's often better to put down less, accept PMI, and keep a cushion. Account for all the cash needs of buying, not just the down payment: closing costs, moving, immediate repairs, and furnishing are substantial and separate. Consider the market: in an appreciating market, buying sooner with a smaller down payment (and PMI) can beat waiting years to save 20%, because rising prices and rent paid while waiting often exceed the PMI cost — while in a flat or falling market, waiting to avoid PMI and reduce the loan may make more sense. Explore your options: low-down-payment loans (conventional 3-5%, FHA 3.5%, VA/USDA zero-down for the eligible) and down payment assistance programs can make buying possible sooner than saving 20% would allow. Don't over-commit either — putting far more than 20% down ties up cash in illiquid home equity that might do better invested, depending on your mortgage rate. Use the calculator to see the down payment and loan at different percentages, making the cash-versus-loan tradeoff concrete, then choose the level that balances avoiding PMI, keeping adequate reserves, buying at the right time, and not over-committing cash — a deliberate decision based on your finances and market, not a default 20% or the minimum you can scrape together.

What people get wrong

• Draining your emergency fund to reach 20% down — keeping reserves matters more than avoiding PMI.
• Forgetting closing costs, moving, and immediate home expenses, which are substantial and separate from the down payment.
• Assuming you must have 20% — many loans allow 3-5% or even zero down, and assistance programs exist.
• Waiting years to save 20% in an appreciating market, where rising prices and rent paid often exceed the PMI you'd avoid.

Where the math comes from

Down payment = home price × down payment percentage / 100. Loan amount = home price − down payment. The 20% threshold matters because most conventional loans require private mortgage insurance (PMI) below it, adding to the monthly cost until you reach 20% equity, at which point PMI can typically be removed.

Questions and answers

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