- Payment = amount financed x monthly rate / (1 - (1 + monthly rate) ^ -months).
- Checked against Wisetack's published $5,500 example: $253.54 a month for 24 months at 9.9%.
- Text the example to a customer; the link opens with your numbers.
- Lenders set the real rate; this is an example.
How to use it
- Enter the job price and any deposit the customer pays up front.
- Enter an APR. Use 0% for a promotional plan, or a rate the lender quoted. Not sure? Try a few; providers publish ranges, such as 0% to 35.9% at Wisetack.
- Pick a term. The table shows the same job over every term at once.
- Tap Text this to a customer. Your phone opens a text with the example and a link to this page with the numbers filled in.
Nothing you type is saved or sent anywhere; the numbers live in the page and in the link you choose to share. Use it at the kitchen table with the customer, or after the visit when they ask what the bigger option would cost each month.
How the payment is worked out
It is the standard loan payment: the amount financed times the monthly rate, divided by one minus one plus the monthly rate to the power of minus the number of months. The monthly rate is the APR divided by 12. At 0% APR it is simply the amount divided by the months.
As a check, Wisetack's own example, $5,500 at 9.9% APR for 24 months, comes to $253.54 a month here, the same as it publishes. Real offers can add fees or round differently; the lender's disclosure is the final number.
Worked examples
| Job | APR | Term | Monthly | Total paid |
|---|---|---|---|---|
| $5,500 | 9.9% | 24 months | $253.54 | $6,084.96 |
| $5,500 | 0% | 3 months | $1,833.33 | $5,499.99 |
| $10,000 | 8.94% | 84 months | $160.59 | $13,489.56 |
The first two rows are Wisetack's published example; the third uses Acorn Finance's example, which it shows as 84 payments of $161; lenders round and add fees their own way. Both read on their own pages on October 9, 2026.
The words on a financing offer
- APR is the yearly cost of the loan, including interest and some fees, as a percent. Providers publish ranges, such as 0% to 35.9% at Wisetack and 0% to 35.99% at Sunbit.
- Term is the number of monthly payments. A longer term lowers the payment and raises the total paid.
- Amount financed is the job price minus anything paid up front, such as your deposit.
- A 0% promotional plan charges no interest if paid on schedule. A deferred interest plan charges interest from the start if the balance is not paid in full by the end of the promotion, so the two are not the same.
- Prequalification shows the customer likely options; Wisetack and Acorn Finance say it does not affect the customer's credit score.
Sending it to a customer
The text says it is an example and that the lender sets the real rate, so you never promise a payment you cannot guarantee. The link opens this page with the same numbers, so the customer can change the term and see their own options.
When they are ready, they apply with the lender. On Koira, they can choose Affirm or Klarna on the same page they would pay by card, for invoices from $50 to $30,000. Compare every provider.
Sources, each read on the provider's own site on October 9, 2026: Wisetack for home services, Acorn Finance for contractors, and Koira pricing. We read each page's own text; we did not use summaries or third-party lists.