Truck Loan Payment Calculator
Estimate your monthly payment, total interest, and total cost of financing a semi-truck or commercial vehicle. Uses the standard amortized loan formula.
Estimates only — actual lender terms vary.
Your Results
- Monthly Payment
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- Amount Financed
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- Total Payment
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- Total Interest
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Why your monthly payment isn't the full cost
Your truck payment is typically one of your largest fixed monthly expenses. The monthly payment number is what fits your cash flow, but the total interest is what the loan actually costs you. On a $77,500 loan at 7.5% APR over 60 months, you pay about $15,700 in interest — nearly 20% of the amount borrowed. Comparing loan scenarios with different terms and rates requires looking at total interest, not just monthly payment.
Once you know your monthly payment, plug it into the Monthly Profit Calculator alongside your other expenses to see how the loan affects your net margin.
What affects your rate
Commercial truck loan rates vary more than personal auto loans. The main factors lenders look at: credit score (scores below 650 often mean rates above 10%), time in business (under 2 years is considered higher risk by most lenders), down payment size, truck age and mileage, and whether you have an existing relationship with a lender. A 20% down payment can meaningfully lower your rate compared to 10% down on the same truck. It also reduces your financed amount and total interest even if the rate stays the same — run both scenarios here before deciding how much to put down.
The 7.5% APR default is a mid-market estimate based on commonly reported ranges for owner-operators with established credit. Rates in 2025–2026 have ranged roughly 6–14% depending on lender and borrower profile. Use your actual pre-approval rate if you have one.
Formula
Amount Financed = Truck Price + Fees − Down Payment
Monthly Rate = APR ÷ 100 ÷ 12
Monthly Payment = Principal × Monthly Rate ÷ (1 − (1 + Monthly Rate)^(−Term))
If APR = 0: Monthly Payment = Principal ÷ Term
Total Payment = Monthly Payment × Term
Total Interest = Total Payment − Amount Financed
Example
A $85,000 truck with $10,000 down, $2,500 in fees, 7.5% APR, 60-month term: Amount financed = $77,500. Monthly rate = 0.625%. Monthly payment ≈ $1,553. Total paid ≈ $93,180. Total interest ≈ $15,680.
Frequently Asked Questions
- What credit score do I need to finance a semi-truck?
- Requirements vary by lender. Some commercial truck lenders work with scores as low as 600, though rates will be higher. Scores above 680 generally access better terms. CDL experience, time in business, and down payment size also affect approval and rate.
- How long are typical semi-truck loan terms?
- Common loan terms range from 36 to 84 months. Longer terms lower your monthly payment but increase total interest paid. Most owner-operators opt for 48–72 month terms to balance cash flow with total cost.
- Should I put more money down on a truck?
- A larger down payment reduces your financed amount, your monthly payment, and your total interest. It can also help secure a lower rate by reducing lender risk. The trade-off is using cash that could cover operating expenses during slow months. Aim for at least 10–20% down if possible.
- Is it better to finance through the dealership or a bank?
- Get at least two quotes before signing anything. Dealers sometimes have lender relationships with competitive rates, but they also have an incentive to mark up the rate. One quote from the dealer's preferred lender and one from a bank or credit union you already work with is a reasonable minimum. A half-point difference in APR on a $75,000 loan over 60 months is about $1,100 in total interest — worth the extra phone call.
- Is there a penalty for paying off a truck loan early?
- Some commercial truck loans include prepayment penalties, typically 1–3% of the remaining balance if paid off within the first 12–24 months. Read the contract before making extra principal payments. If there's no penalty, paying down the principal early reduces total interest significantly — most of each early payment goes to interest rather than principal, so extra payments in year one or two have a disproportionate effect.
Sources & Assumptions
- APR default (7.5%) is a mid-market estimate based on commonly reported commercial truck loan rates in 2025–2026; actual rates depend on credit profile, lender, down payment, and truck age.
- Uses standard amortized loan formula. Does not account for balloon payments, variable rates, or additional lender fees.
- Rate range cited (6–14% for owner-operators) is based on commonly reported lending market data — verify with your actual lender pre-approval.
Disclaimer: This calculator provides estimates based on standard amortization. Actual loan terms, rates, and fees are determined by your lender. Results do not constitute a loan offer or financial advice. Consult your lender for actual terms.