Turn a big job total into an easy monthly payment. Enter the amount, the APR your lender quotes, and the term, and see the monthly payment, total paid, and total interest. Embed it on your own site in one line.
Illustrative estimate only. Not a loan offer, application, or guaranteed rate. Enter the APR your lender quotes. Confirm real terms with your financing provider before presenting them to a customer.
Embed this on your site.
Copy this snippet and paste it into your website. It loads a clean, calculator-only version (no header or footer) so customers can run a monthly payment right on your page.
When a homeowner sees a $14,000 roof or HVAC quote, the total can feel out of reach. Frame the same job as a monthly payment and it suddenly feels affordable. This calculator turns any job amount, APR, and term into the monthly payment, total paid, and total interest, so you can show financing on the spot and close more high-ticket jobs.
The formula
It uses the standard fixed-rate amortization formula. We start with the amount financed (your job amount minus any down payment), the monthly rate (the APR your lender quotes, divided by 12 and by 100), and the number of months in the term:
M = P × r × (1 + r)^n ÷ ((1 + r)^n − 1)
Here M is the monthly payment, P is the amount financed, r is the monthly rate, and n is the number of months. When the APR is 0, there is no interest, so the payment is simply P ÷ n. Total paid is M × n, and total interest is (M × n) − P.
Why a monthly payment closes more jobs
Higher-ticket trades (roofing, HVAC, full remodels, windows, solar) consistently win more work when the price is shown as a manageable monthly payment next to the total. The customer can picture fitting it into their budget instead of stalling on a scary lump sum. The key is to show financing while they are still excited, not days later after the moment has passed.
Free, embeddable, and honest about the numbers
Hearth and similar financing widgets charge roughly $1,499 to $4,999 per year, and the embeddable payment widget is the core of that subscription. This tool is free, instant, and embeddable, and it uses the APR you enter from your own lender, so nothing is invented. The result is clearly labeled illustrative, never a loan offer or a guaranteed rate, which keeps you compliant and honest with customers.
Pro tips
Always enter the exact APR your lender or financing partner quotes for the specific plan, promotional and standard plans differ a lot.
Show the monthly payment next to the total on every high-ticket quote, not just when a customer asks about financing.
Use a down payment field to reduce the amount financed and lower the monthly number when a customer is close to a yes.
Longer terms lower the monthly payment but raise total interest, show a short and a long term side by side so the customer chooses.
Embed the calculator on your services and pricing pages so visitors can self-qualify before they ever call.
Frequently asked questions
How is the monthly payment calculated?
It uses the standard fixed-rate amortization formula. The monthly payment equals P times r times (1 plus r) to the power n, divided by ((1 plus r) to the power n minus 1), where P is the amount financed, r is the monthly rate (APR divided by 12 divided by 100), and n is the number of months. If the APR is 0, the payment is simply the amount financed divided by the number of months.
Is this a loan offer or a guaranteed rate?
No. This is an illustrative estimate only. It is not a loan offer, application, or guaranteed rate. Enter the APR your lender actually quotes, and confirm the real terms with your financing provider before presenting them to a customer.
What APR should I enter?
Enter the APR your lender or financing partner quotes for the plan you offer. Promotional plans (such as deferred-interest or 0 percent offers) and standard installment plans have very different APRs, so use the exact rate for the specific plan.
Why do customers buy more when they see a monthly payment?
A large total like 14,000 dollars can feel out of reach, but the same job framed as a manageable monthly payment feels affordable. Higher-ticket trades like roofing, HVAC, and remodeling consistently close more jobs when the price is shown as a monthly payment alongside the total.
Can I put this calculator on my own website?
Yes. Use the embed section to copy a one-line iframe snippet that loads the calculator on your site. The free embed shows the same monthly payment math. The Pro version adds your branding, real lender offers, and instant pre-qualification so customers can get approved on the spot.
The Pro version embeds a branded financing tool on your site with real lender offers and instant pre-qualification, so customers can get approved while they are still excited.
