Down Payment Calculator
See how much cash you need for a down payment, and whether you'll need PMI.
Enter your numbers and select Calculate to see results.
About This Calculator
This calculator shows the dollar amount needed for a down payment at any percentage of the home price, the resulting loan amount, and flags whether that down payment is likely to trigger private mortgage insurance (PMI) — which conventional lenders generally require below 20% down.
How This Is Calculated
Down Payment = Home Price × Down Payment %
- Down Payment %
- — The percentage of the home price you're paying upfront
A $400,000 home with 10% down requires $40,000 upfront, leaving a $360,000 loan — and would typically require PMI.
Assumptions
- PMI estimate uses a 0.75%-of-loan-amount annual midpoint; actual PMI rates range roughly 0.3%–1.5% depending on credit score, loan-to-value ratio, and insurer.
- Does not include closing costs, which are separate from the down payment.
Frequently Asked Questions
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Last updated January 15, 2026. Results are estimates for informational purposes only — read our disclaimer.