Calculator
Plumbing Financing Calculator
Show customers what a water heater or repipe costs per month, not just the sticker price. Enter the job total, any down payment, the lender APR, and the term to get the monthly payment, total interest, and total of payments — plus a side-by-side comparison of common terms. Uses the standard loan amortization formula. Free, no signup.
Free
Amount financed$4,500
Common terms
10.0% APR36 month term
Customer pays / month
$145.18
$4,500 financed over 36 months at 10.0% APR
Within typical contractor financing range
Total interest$5,227 paid in total · 13.9% of payments
$727Payment at a glance
Monthly payment
$145.18Level payment, same every month
Amount financed
$4,500Full job total — nothing down
Total of payments
$5,22736 payments over the loan
Total interest
$72716.1% on top of the amount financed
First payment split
$37.46interest + $107.72 principal on payment #1
Compare terms
| Term | Monthly | Total interest |
|---|---|---|
| 12 mo | $395.60 | $247 |
| 24 mo | $207.63 | $483 |
| 36 moselected | $145.18 | $727 |
| 48 mo | $114.11 | $977 |
| 60 mo | $95.59 | $1,235 |
A longer term lowers the monthly payment but the customer pays more interest overall. Show two or three options and let them pick the one that fits their budget.
Where the money goes
- Amount financed: $4,500
- Total interest: $727
Over 36 months the customer pays $5,227 — $4,500 for the job and $727 in interest.
Financing benchmarks
- Water heater / repipe
- $3,500–$6,000
- Financing APR (good credit)
- 7.99–9.99%
- Common terms
- 24–60 months
- Approval
- Often instant · $500–$25k
Contractor financing APR: 0% promo · 7.99–9.99% good credit · up to ~18% fair credit
Watch 0% "promotions" — most are deferred-interest, not true 0%. Interest accrues at the full APR from day one and is only waived if the whole balance is paid off before the promo period ends.
What you'll get
Enter the job total and down payment
Put in the price you are quoting and any deposit the customer pays up front. Only the remainder is financed — the calculator shows the amount financed instantly.
Set the APR and term
Use the APR from your lender (GreenSky, Wisetack, Synchrony, and others typically run 7.99–9.99% for good credit) and pick a term. Quick chips cover 12–72 months.
Present the monthly payment
See the level monthly payment, total interest, and total of payments. Compare terms side by side and let the customer pick the payment that fits their budget.
How it works
- 1
Enter the job total and down payment
Put in the price you are quoting and any deposit the customer pays up front. Only the remainder is financed — the calculator shows the amount financed instantly.
- 2
Set the APR and term
Use the APR from your lender (GreenSky, Wisetack, Synchrony, and others typically run 7.99–9.99% for good credit) and pick a term. Quick chips cover 12–72 months.
- 3
Present the monthly payment
See the level monthly payment, total interest, and total of payments. Compare terms side by side and let the customer pick the payment that fits their budget.
How plumbing contractors use a financing calculator to close bigger jobs
Price resistance almost always comes down to the number on the invoice. Reframing a water heater or repipe as an affordable monthly payment — "$150 a month" instead of "$8,000" — is one of the most reliable ways to win approval on high-ticket work. This calculator turns any quote into that monthly figure in seconds, so you can present financing at the kitchen table with confidence.
It uses the same fully-amortizing loan formula every lender uses: the monthly payment is principal times the monthly rate, scaled by the standard amortization factor, so the balance pays off to exactly zero over the term. You also see the total interest and total of payments, plus a comparison across common terms — a longer term lowers the monthly payment but costs more interest overall. One caution worth passing along: most "0%" promotions are deferred-interest offers, where interest accrues at the full APR from day one and is only waived if the balance is paid in full before the promo ends.
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View statesFinancing Calculator FAQs
How do I calculate a monthly payment for plumbing financing?
Use the standard loan amortization formula: monthly payment = P × i × (1 + i)^n ÷ ((1 + i)^n − 1), where P is the amount financed, i is the APR divided by 12, and n is the number of months. For a $8,000 job at 9.99% APR over 60 months, that is about $170/month. At 0% APR the payment is simply the amount financed divided by the number of months.
What APR and term should I use?
Contractor financing through providers like GreenSky, Wisetack, Synchrony, and Wells Fargo typically runs 7.99–9.99% APR for good credit, higher for fair credit, and 0% for qualifying promotional plans. Terms range from 12 to 72 months, with 36–60 months most common on larger jobs. Use the actual APR and term from your lender for an accurate quote.
Does a longer term save the customer money?
No — a longer term lowers the monthly payment but increases the total interest paid, because the balance is outstanding for more months. A shorter term costs more per month but less overall. Show two or three terms side by side so the customer can trade off the monthly payment against total cost.
Is this financing calculator free?
Yes. Every tool on CloseCrew is free for contractors — no account required. Pair it with the Profit Margin and Job Pricing calculators to make sure the price you finance still clears your margin.
