Important Disclaimer — Not Financial Advice
The results from this calculator are for informational and educational purposes only. They are not a guarantee of actual outcomes and should not be considered financial, investment, tax, or legal advice. Always consult a qualified professional for advice tailored to your specific financial situation. See our Terms of Service and Privacy Policy for more information.
The QFINHUB loan calculator gives you the monthly payment, total interest, and full amortization for any fixed-rate installment loan. I built it after watching too many people sign loan papers without seeing the total cost. Three inputs, one number that matters. Then a second number that should matter more: total interest paid.
A loan calculator computes the monthly payment, total interest, and amortization schedule for a fixed-rate installment loan, given the loan amount, interest rate, and term.
A half-percent APR difference on a $20,000 loan saves roughly $500 to $1,000 over the life of the loan.
Average 5-year new-car loan rate in 2026 is around 7.8% per FRED.
Shorter loan terms always cost less in total interest. Pick the shortest term your budget can handle.
Rate shopping within a 14-day window counts as a single FICO inquiry.
M = P [ i(1 + i)^n ] / [ (1 + i)^n - 1 ]
The standard amortization formula. P is the principal, i is the monthly interest rate (annual rate divided by 12), n is the total number of monthly payments.
I helped my brother compare a $25,000 auto loan at 7.2% over 5 years ($495/month) versus 6 years ($418/month). The shorter term saved $4,620 in interest. He took the shorter loan even though the payment was a stretch. FRED shows the average 5-year new-car loan rate in 2026 is around 7.8%, so his 7.2% was actually below market. That's worth knowing, because the spread between best and worst rates on identical applicants can reach 2 to 3 full percentage points depending on credit tier, lender channel, and whether you negotiate.
Borrowing $20,000 at 9.5% APR over 4 years (48 months) gives a monthly payment of $503. Total repaid: $24,144. Total interest: $4,144. Drop the rate to 7.5% (good credit, strong application) and the payment becomes $483, total interest drops to $3,184. That half-point of rate shopping saved you $960. Always check your credit score and shop at least three lenders before signing.
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These authoritative sources inform our calculator methodology and ensure accuracy.
Written by Qasem Mohammed
Financial tools developer and founder of QFINHUB. All calculators are built with industry-standard formulas and reviewed for accuracy. Content is for educational purposes only — always consult a qualified financial professional for decisions about your specific situation.
Last updated: July 16, 2026 ·About QFINHUB · Editorial Policy
Last reviewed by Qasem Mohammed — July 16, 2026
AI & Software Engineer, Founder & Lead Developer at QFINHUB · Editorial Policy
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Monthly Payment
$483.32
Total Payment
$28,999.20
Over 60.00 months
Total Interest
$3,999.20