Conventional Loan Down Payment Calculator and Guide

A conventional-loan down payment is the part of a home’s purchase price you pay upfront; the loan covers the remaining amount. This calculator estimates the down payment and starting loan amount from the price and a down-payment percentage, so you can see how changing either figure affects the split.

Formula

The down payment equals the purchase price multiplied by the down-payment percentage expressed as a decimal. The starting loan amount equals the purchase price minus the down payment.

• Price (price): the home purchase price, in dollars.
• Down-payment percentage (pct): the share of the price paid upfront, entered as a percentage from 0 to 100.
• Down payment (down): price × pct ÷ 100, in dollars.
• Starting loan amount (loan): price − down, in dollars. It does not include any later adjustments, financed costs, or other funds.

Worked Example

Using the calculator defaults—price $300,000 and down payment 5%:

1. Convert 5% to a decimal: 5 ÷ 100 = 0.05.
2. Calculate the down payment: $300,000 × 0.05 = $15,000.00.
3. Subtract it from the price: $300,000 − $15,000 = $285,000.00 as the starting loan amount.

These results use the calculator’s stated formula and are rounded to cents.

Assumptions

• The entered price is the amount used for this simple estimate; the calculator does not determine a home’s appraised value.
• The percentage applies directly to that price.
• The calculation does not model interest, payment timing, or compounding.
• It excludes closing costs, prepaid costs, taxes, insurance, mortgage insurance, escrow, fees, and any credits or other funds.

What a Conventional Loan Down Payment Means

A conventional mortgage is generally a home loan that is not insured or guaranteed through a government housing program. The down payment is the buyer’s upfront contribution toward the purchase price, not a separate fee. For example, a 10% down payment on a $300,000 purchase is $30,000, leaving $270,000 as the simple starting loan amount before other transaction details.

There is no single down-payment percentage that applies to every conventional mortgage. The amount required for an individual transaction can depend on the loan product, occupancy, property, borrower profile, and lender requirements. Some conventional options may allow relatively small down payments for eligible borrowers; other transactions may require more. Get the applicable minimum and all costs directly from the lender rather than treating a general percentage as a promise of eligibility.

How to Use the Calculator

Enter the home purchase price and the percentage you expect to pay upfront. The first output is the dollar down payment; the second is the price less that amount. Try a few percentages to understand the arithmetic—for instance, 3%, 5%, 10%, or 20%—but remember that the tool does not decide whether a lender will accept a particular figure.

• Use the purchase price, not the amount you hope to borrow, as the price input.
• Enter a percentage as a number: type 5 for 5%, not 0.05.
• Check that the down-payment amount is available for the transaction, while separately accounting for costs this calculator omits.
• Ask the lender for the exact loan amount and cash-to-close estimate for the specific transaction.

A 0% entry is mathematically valid in this calculator, but it does not establish that a zero-down conventional mortgage is available to you. Likewise, a 100% entry yields a zero starting loan amount as arithmetic, not a statement about a lender’s requirements or a typical purchase.

Down Payment, Closing Costs, and Mortgage Insurance

The down payment is only one part of the cash needed to complete a home purchase. Closing costs and prepaid items may be due separately, and their amounts vary by transaction. Depending on the loan and circumstances, mortgage insurance may also apply. These costs do not reduce the purchase price in this calculator, and the tool cannot estimate them without additional transaction-specific inputs.

A common misconception is that putting 20% down is a universal condition for getting a conventional loan. It is not a universal minimum: requirements depend on the product and borrower, and a smaller down payment may be possible in some cases. At the same time, a smaller upfront contribution means a larger starting loan for the same price. The calculator shows that direct relationship; it does not calculate mortgage insurance, monthly payments, or approval.

Choosing a Percentage and Understanding the Limits

Use the percentage input to compare scenarios, not as a recommendation. Raising the percentage reduces the calculated starting loan dollar for dollar, while lowering it increases the amount left to borrow. This calculation alone does not show the full cost of owning the home, the future payment, or whether a lender will approve an application. Those questions require terms and facts not included here, such as the offered rate, loan term, transaction costs, and lender-specific requirements.

Be careful not to confuse the down payment with a deposit, earnest money, or closing costs. A deposit paid earlier may be credited toward funds due at closing, depending on the transaction, but it is not automatically an additional down payment on top of the amount calculated. Ask the relevant transaction professionals how earlier payments are accounted for. Also, the actual loan amount can differ from price minus down payment when other transaction details or financing arrangements apply.

Frequently Asked Questions

What is the minimum down payment for a conventional loan?
There is no single minimum for every conventional mortgage. Requirements depend on the loan and borrower circumstances. Ask the lender about the specific product and transaction; the calculator only shows the result of a percentage you enter.

Can you get a conventional loan with 5% down?
Some conventional loan options may permit a down payment of 5% for eligible borrowers, but availability and requirements vary. A 5% result in this calculator is an arithmetic example, not confirmation of eligibility.

Is 20% down required for a conventional loan?
No single 20% rule applies to all conventional mortgages. A larger down payment reduces the starting loan amount, but the lender determines applicable requirements and whether mortgage insurance or other conditions apply.

Does the down payment include closing costs?
No. This calculator defines the down payment as a percentage of the purchase price. Closing costs, prepaid items, and other cash due are not included and should be estimated separately for the transaction.

Does a smaller down payment mean a higher monthly payment?
For otherwise identical loan terms and interest rate, a smaller down payment leaves a larger starting loan, which generally results in a higher principal-and-interest payment. This calculator does not estimate monthly payments or other housing costs.

Is the down payment based on the purchase price or appraisal?
This calculator applies the percentage to the purchase price you enter. A lender may use transaction-specific valuation and underwriting details; confirm the applicable basis and final figures with the lender.

This result is an estimate of the arithmetic only; the lender’s disclosure gives the exact figures.

Related

• Understanding Escrow Statements and What They Show
• Short Year Escrow Statement Model Form
• Short Year Escrow Statement: What It Means

in price | Home purchase price | $ | 300000 | 0 | 100000000
in pct | Down payment | % | 5 | 0 | 100
out down | Down payment amount | $ | price * pct / 100 | 2
out loan | Starting loan amount | $ | price - down | 2