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Calculator results are estimates for planning, not a loan approval, commitment, rate lock, or Loan Estimate.
What the down payment calculator calculates
This tool compares down-payment scenarios — typically ranging from 3% up to 20% or more — for a given home price, showing how each one changes the loan amount, your estimated monthly payment, and whether private mortgage insurance (PMI) applies.
A bigger down payment lowers your loan amount and monthly payment, but it also ties up more cash upfront. A smaller down payment preserves cash for closing costs, moving expenses, and reserves, but usually means a higher payment and often PMI. This calculator is built to make that tradeoff visible side by side.
It's a planning tool, not a program eligibility checker — actual minimum down payments depend on the specific loan program (conventional, FHA, VA, USDA) and your qualifying factors.
How to use it, step by step
- 1Enter the home price you're planning around.
- 2Enter an interest rate and loan term to test the payment impact.
- 3Compare the calculator's down-payment scenarios — from a minimal down payment up to 20% — and note how the loan amount and payment change at each one.
- 4Check which scenarios trigger PMI (generally anything below 20% down on a conventional loan) and factor that into the payment comparison.
- 5Decide on a target down payment that balances your available cash against the monthly payment you're comfortable carrying.
A worked example
Example inputs
- Home price
- $400,000
- Down payment A
- 5% ($20,000)
- Down payment B
- 20% ($80,000)
- Interest rate (example only)
- 6.5%
Result
At 5% down, the loan amount is $380,000; at 20% down, it's $320,000 — a $60,000 difference that flows directly into the monthly principal-and-interest payment.
The 5% scenario will also typically carry PMI until roughly 20% equity is reached, adding an extra line to the monthly payment that the 20%-down scenario avoids entirely.
The 6.5% rate above is an illustrative example input only, not a current quote.
How to read the result
Look at the total monthly payment difference between scenarios, not just the down-payment dollar amount — a smaller down payment's PMI cost plus higher principal-and-interest can add up.
If a lower-down-payment scenario still leaves you with a comfortable emergency fund and reserves, it may be the better move even with PMI, since it preserves cash flexibility.
PMI on a conventional loan isn't permanent — it typically cancels once you reach around 20% equity, so a 5%-down payment today doesn't mean PMI forever.
Common mistakes
- Putting every available dollar toward the down payment and leaving no cash reserve for closing costs, moving expenses, or an emergency after you move in.
- Assuming 20% down is required to buy a home — many conventional loans go as low as 3%, FHA as low as 3.5%, and VA and USDA loans can offer 0% down for eligible borrowers.
- Forgetting that a lower down payment usually means PMI, which adds to the monthly payment beyond just the larger loan amount.
- Comparing scenarios only on down-payment size instead of the full monthly payment, which is what actually affects your budget.
Related guides
- Mortgage Payment Calculator
- Closing Costs Calculator
- Home Affordability Calculator
- Glossary: Down Payment
Frequently asked questions
It depends on the loan program. Conventional loans can go as low as 3% for qualified first-time buyers, FHA loans as low as 3.5%, and VA and USDA loans can offer 0% down for eligible borrowers. There's no single universal minimum.
On a conventional loan, generally yes — PMI typically applies below 20% down and cancels once you reach around 20% equity. FHA loans have their own mortgage-insurance rules that work differently; see the FHA MIP calculator for those.
It depends on your situation. A larger down payment lowers your monthly payment and total interest, but a healthy cash reserve protects you if something unexpected comes up after you move in. Many buyers land somewhere in between rather than at either extreme.
Many loan programs allow down payment gifts from family members, with documentation requirements to show the funds are a genuine gift and not a loan that has to be repaid. Program rules on gift funds vary, so confirm the specifics for your loan type.
A larger down payment lowers your loan-to-value ratio, which can improve pricing on many loan programs, though the exact effect depends on the lender, your credit profile, and the loan type.