Down Payment Calculator Widget

Add a down payment calculator for home buyers. Readers enter the price, the down-payment percentage and closing costs and see the down payment, the loan, the loan-to-value ratio and the cash they need on completion day.

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<iframe src="https://a2z.tools/embed/w/down-payment-calculator" title="Down Payment Calculator by A2Z Tools" width="100%" height="600" style="border:0;width:100%" loading="lazy" allow="clipboard-write"></iframe>

A plain iframe. Works everywhere, including site builders that strip scripts. Adjust height if your content needs more room.

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How it works

The down payment is a percentage of the price and the loan covers the rest. Loan-to-value (LTV) is the loan divided by the price - the figure lenders use to set rates and decide whether mortgage insurance is needed. Closing costs are added on top because they are usually paid in cash, and if the reader enters their savings the widget shows how much is still to save.

Calculation method

  • Down payment = price x down % / 100
  • Loan = price - down payment; LTV = loan / price x 100
  • Closing costs = price x closing % / 100 (entered as a share of the price, not the loan)
  • Cash needed = down payment + closing costs; still to save = cash needed - savings entered
  • Money is displayed to whole currency units and LTV to 2 decimals; nothing is rounded before display

Worked examples

10% down with closing costs

Inputs: Price 350,000, down payment 10%, closing costs 3%

Result: Down payment 35,000; loan 315,000; LTV 90%; closing costs 10,500; cash needed 45,500

At 90% LTV the widget adds a mortgage-insurance note, because the down payment is under 20%.

20% down against savings

Inputs: Price 420,000, down payment 20%, closing costs 2.5%, savings 95,000

Result: Down payment 84,000; loan 336,000; LTV 80%; closing costs 10,500; cash needed 94,500; left over 500

At exactly 80% LTV no mortgage-insurance note is shown, and the saver has 500 to spare.

Limitations

  • Closing costs are a single percentage of the price; real Loan Estimates itemise lender fees, title, transfer taxes and prepaid escrow, and some are fixed amounts. Outside the US, purchase taxes such as UK stamp duty or Indian registration charges follow bands or state rates - enter them as the closing-cost percentage.
  • It does not add the cost of mortgage insurance or say which loan programmes accept a given LTV.
  • LTV is measured against the price you enter; if the appraisal comes in lower, the lender's LTV will be higher.

Where publishers use it

  • First-time-buyer guides on how much to save
  • Estate agents' listing pages showing the upfront cash
  • Mortgage brokers explaining LTV bands
  • Savings-account pages aimed at house deposits
  • Housing-counselling agencies and down-payment-assistance programme pages showing the gap a grant must fill

Questions

Do I need 20% down?

No, but in the US a conventional loan with under 20% down normally requires private mortgage insurance, and many lenders price rates by LTV band. Some government-backed loans accept much less.

What do closing costs cover?

Lender fees, appraisal, title or legal work, taxes and prepaid items. 2% to 5% of the loan or price is a common range in the US; other countries have their own purchase taxes.

What is LTV?

Loan-to-value: the loan as a percentage of the property's value. 10% down means a 90% LTV. Lenders measure it against the appraised value, so a low valuation raises the LTV even if the price is unchanged.

Why does the widget flag anything above 80% LTV?

Below 20% down, a conventional US loan normally requires private mortgage insurance, according to the CFPB. The note is a reminder to budget for that premium; FHA, VA and non-US loans have their own rules.

Is the down payment the only cash I need?

No. Closing costs come on top, and lenders may also want cash reserves left after closing. At a 3% closing-cost estimate, a 350,000 purchase with 10% down needs 45,500 in cash, not 35,000.

How much does moving from 10% to 20% down change things?

On a 350,000 home the loan drops from 315,000 to 280,000 and LTV from 90% to 80%, while the 3% closing-cost estimate stays 10,500 because it is a share of the price. Cash needed rises from 45,500 to 80,500 - the extra 35,000 is what removes the mortgage-insurance note.

Can I enter an earnest-money deposit I have already paid?

Add it to 'Savings you have'. Earnest money is normally credited towards the down payment or closing costs at settlement, so it reduces what is still to save rather than the price.

Can gifted money count towards the down payment?

Often yes, but lenders usually want a signed gift letter confirming it is not a loan, plus bank statements tracing the funds. Enter gifted money in 'Savings you have' only once it is documented, and ask whether your loan programme limits how much of the deposit may be a gift.

Sources

  1. What is private mortgage insurance? - Consumer Financial Protection Bureau (US) . PMI may be required on a conventional loan with a down payment below 20% of the purchase price.
  2. What is a loan-to-value ratio and how does it relate to my costs? - Consumer Financial Protection Bureau (US) . LTV definition (amount financed compared with appraised value) and its effect on rates and mortgage insurance.

Cite or recommend this tool

If you reference this tool in an article, course or documentation, these formats are ready to copy. They are optional - nothing is added to your site unless you paste it.

A2Z Tools Down Payment Calculator
https://a2z.tools/embed/down-payment-calculator

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