How Much Is a Down Payment on a House?

· by AskDoss Editorial Team · 5 min read

Scope: supporting copy only. The calculator tool itself (inputs, math, defaults) is owned by the CTO and unchanged here. This refresh removes fabrication carryover and adds E-E-A-T (dated, sourced numerics +).

What putting X% down actually costs you

Your down payment is the cash you pay upfront toward the purchase price of a home; the rest is your mortgage loan. It’s the single biggest number most buyers bring to the closing table, and it does two things at once: it lowers the amount you borrow, and — depending on how large it is — it decides whether you pay for private mortgage insurance (PMI) every month.

The trade-off is real money on both sides. A larger down payment means a smaller loan, a lower monthly principal-and-interest payment, and (past a threshold) no PMI. A smaller down payment keeps more cash in your pocket for reserves, moving costs, and repairs — but usually adds a monthly PMI premium until you build enough equity.

This calculator shows you both halves: the upfront dollars a given percentage costs you today, and how that percentage ripples into your monthly payment. Enter a purchase price and a down-payment percentage; the tool returns your down-payment dollars, your resulting loan amount, whether PMI applies, and an estimated monthly payment.

How this calculator works

The core math is straightforward:

  • Down payment ($) = purchase price × down-payment percentage. On a $400,000 home, 10% down is $40,000; 20% down is $80,000.
  • Loan amount = purchase price − down payment. The larger your down payment, the less you borrow, and the lower your monthly principal-and-interest payment for a given rate and term.
  • PMI (private mortgage insurance) applies on most conventional loans when your down payment is below 20% — i.e., when your loan-to-value (LTV) ratio is above 80%. PMI is an added monthly cost that protects the lender, not you, and it goes away once you build sufficient equity (see FAQ). (PMI is generally required with a down payment under 20% on a conventional mortgage — source: Consumer Financial Protection Bureau / Homeowners Protection Act guidance, 2026.)
  • Monthly payment combines principal and interest, and — where applicable — PMI. Property taxes, homeowners insurance, and HOA dues are separate and vary by location; check whether the tool’s default includes them.

Minimum down payments by loan type (source figures — verify before publish):

Loan type Typical minimum down payment
Conventional 3% (first-time-buyer programs); many standard loans start at 5%
FHA 3.5% with a credit score of 580+; 10% for scores 500–579
VA (eligible military/veterans) 0%
USDA (eligible rural/income) 0%
To avoid PMI (conventional) 20%

Sources: minimum down-payment figures per loan type — mortgage-lender program guidance current as of 2026 (Heart Mortgage / AmeriSave / The Mortgage Reports, 2026). FHA 3.5%-at-580 / 10%-at-500–579 tiers — FHA program guidance, 2026. PMI-avoidance at 20% down — Homeowners Protection Act, 1998 (LTV framework).

Loan-type minimums are eligibility floors, not recommendations — putting down the minimum maximizes your loan and, below 20%, adds PMI.

The trade-off: bigger down payment vs. keeping cash

More down is not automatically “better.” It’s a trade-off across three things:

  • PMI. Reaching 20% down on a conventional loan removes the PMI premium from your monthly payment. If you’re close to 20%, closing the gap can be worth it purely on the PMI savings.
  • Cash reserves. Emptying your savings to hit 20% can leave you exposed. Lenders and financial planners generally favor keeping several months of mortgage payments in reserve for emergencies, repairs, and income gaps.
  • Opportunity cost. Cash locked into home equity isn’t invested or liquid. Some buyers intentionally put less down to keep money working elsewhere or to preserve flexibility — accepting PMI as the cost of that liquidity.

There’s no universal right answer. The calculator lets you test a few percentages side by side so you can see the upfront-vs-monthly tension in dollars for your own price point.

Closing costs are separate from your down payment

A common surprise: your down payment is not your only upfront cost. Closing costs — lender fees, title, appraisal, prepaid taxes and insurance, and escrow setup — are charged on top of the down payment and are typically due at closing. They are a separate line item and are not reflected in the down-payment figure this tool produces. Budget for them independently, and ask your lender for a Loan Estimate for an itemized, personalized breakdown.

Frequently Asked Questions

Is a 20% down payment required to buy a home?

No. 20% is the threshold that lets you avoid PMI on a conventional loan — it is not a minimum to buy. Conventional programs can go as low as 3%, FHA as low as 3.5%, and VA/USDA to 0% for eligible buyers.

When does PMI go away?

Under the federal Homeowners Protection Act, on eligible loans a borrower can request PMI cancellation once the loan reaches 80% of the original property value, and PMI automatically terminates when the balance is scheduled to reach 78% of the original value, provided the loan is current. (Different rules can apply to “high-risk” loans and FHA mortgage insurance.) (Source: Homeowners Protection Act, 1998; CFPB/NCUA HPA guidance, 2026.)

Can I use gift funds for my down payment?

Often, yes. Many loan programs allow all or part of a down payment to come from a documented gift, typically from a family member, with a signed gift letter and a paper trail. Rules vary by loan type and lender — confirm requirements before you rely on gift funds.

Is a low down payment risky?

It can be. A smaller down payment means a larger loan, a higher monthly payment, PMI (below 20% on conventional loans), and less equity — which raises the risk of being “underwater” if home values dip. It also preserves cash and can get you into a home sooner. Weigh both sides.

Does a bigger down payment lower my interest rate?

It can. A larger down payment (lower LTV) reduces the lender’s risk and may qualify you for better pricing, in addition to removing PMI at 20%. The effect varies by lender and loan program.

Are property taxes and insurance part of my down payment?

No. Taxes and homeowners insurance are ongoing costs, often collected monthly into escrow, and are separate from both your down payment and your closing costs.

Last reviewed July 3, 2026 by the askdoss Editorial Team. This calculator and its supporting information are for general educational purposes only and are not financial, tax, legal, or investment advice. Figures cited are estimates that change over time — verify current numbers with the relevant institution or a qualified professional before making decisions.