HVAC Financing Cost Calculator
Estimate your monthly payments, total interest paid, and the true cost of financing a new HVAC system over the loan term.
Formula
Loan Principal (P)
P = System Cost − Down Payment
Monthly Payment (M) — Standard Amortising Loan
M = P × [r(1 + r)ⁿ] / [(1 + r)ⁿ − 1] r = Annual Interest Rate ÷ 12 (monthly rate) n = Loan Term in months
Zero-Interest Special Case (APR = 0%)
M = P ÷ n
Total of All Payments
Total Payments = M × n
Total Interest Paid
Total Interest = Total Payments − P
True Total Cost of Ownership
True Cost = Total Payments + Down Payment + Origination Fee − Rebate
Assumptions & References
- Origination fees are treated as an upfront cost and are not rolled into the financed principal; they are added to the true cost of ownership separately.