Solar loan calculator
Payment, total interest and balance after N payments for one level-payment loan.
A modelling aid, not financial, tax or legal advice. Nominal USD, pre-tax. Monthly rate = annual rate / 12, payments at month end, fixed rate. Every default is an invented input from the glossary page, not a market rate or fee.
| Result | Value |
|---|---|
| Financed price (cash price less down payment, USD) | - |
| Principal borrowed, with fees (USD) | - |
| Monthly payment (USD) | - |
| Total of payments (USD) | - |
| Total interest (USD) | - |
| Fees added to the principal (USD) | - |
| Balance owed after N payments (USD) | - |
| Interest paid in the first N payments (USD) | - |
| Principal repaid in the first N payments (USD) | - |
| Year | Paid | Interest | Principal | Balance at year end |
|---|
Method: principal = (price - down payment) / (1 - fee) + flat fee, or (price - down payment) x (1 + fee) + flat fee for the price basis. Payment = P x r / (1 - (1 + r)^-n), with r = annual rate / 12 and n = months; at 0% the payment is P / n. Balance after k payments = P x (1 + r)^k - payment x ((1 + r)^k - 1) / r. Enter numbers without thousands separators, for example 27000, and use a point or comma for decimals, for example 6.5 or 6,5.