Maine Auto Loan Calculator (with Maine Sales Tax & Fees)

Maine applies a flat 5.5% sales tax to vehicle purchases statewide, and unlike many states, Maine does not permit counties or municipalities to layer additional local option sales taxes on top of that rate. That makes Maine's vehicle tax calculation unusually simple to model accurately: the 5.5% rate you see here is the actual rate nearly every Maine buyer will pay, regardless of which town or county the purchase happens in.

This calculator applies that 5.5% rate directly to the vehicle's purchase price, adds a flat estimate for title, registration, and documentation fees, subtracts your down payment and trade-in value, and then amortizes the remaining balance over your chosen loan term to produce a monthly payment and total finance charge.

1. Sales tax on the vehicle price. Maine's 5.5% rate is applied to the purchase price: $\text{Tax} = \text{Price} \times 0.055$.
2. Title, registration, and documentation fees. A flat $350 estimate covers typical paperwork costs for titling and registering a vehicle in Maine.
3. Total vehicle cost. Purchase price plus sales tax plus fees gives the full out-the-door cost before your down payment is applied.
4. Financed amount. Your combined down payment and trade-in value is subtracted from the total vehicle cost, with a floor of $0 if the down payment covers the full cost.
5. Amortized monthly payment. The financed balance runs through the standard fixed-payment amortization formula, $A = P \times \frac{i(1+i)^n}{(1+i)^n-1}$, where $i$ is your APR divided by 12 and $n$ is the loan term in months.
6. Total finance charge. Interest is summed across every period of the amortization schedule to give the total cost of borrowing over the loan term.

The engine computes this using decimal-precision arithmetic across every payment period so that the schedule's cumulative totals match the reported total interest exactly, without the small drift that floating-point rounding can introduce over a multi-year schedule.

Using the default scenario: a $35,000 vehicle, $5,000 down payment and trade-in, a 60-month term, and a 7.25% APR.

1. Sales tax: $35,000 \times 5.5\% = \$1,925.00$.
2. Fees: a flat $350.
3. Total vehicle cost: $35,000 + \$1,925 + \$350 = \$37,275$.
4. Financed amount: $37,275 - \$5,000 = \$32,275$.
5. Monthly payment: amortizing $32,275 at 7.25% APR over 60 months yields a payment of approximately $642.90.
6. Total finance charge: over 60 months, total interest comes to roughly $6,299.

A buyer relying only on the $35,000 sticker price to estimate their payment would miss nearly $2,275 in tax and fees getting rolled into the loan, understating both the financed amount and the eventual monthly payment.

• The Maine registration fee schedule beyond the flat estimate. Maine's actual excise tax on vehicle registration (a separate, declining annual tax based on the manufacturer's suggested retail price and vehicle age) is not modeled here; this calculator's $350 fee covers title and documentation only, not the annual municipal excise tax due at registration and renewal.
• Trade-in tax treatment. Maine's sales tax law generally reduces the taxable amount by the value of a trade-in when the trade happens through a licensed dealer, lowering the effective tax paid below a straight percentage of full purchase price. This calculator combines down payment and trade-in into a single post-tax input and does not model that credit.
• Dealer add-on products. Extended warranties, service contracts, and similar products are not part of the base price or financed amount.
• Rate variation by credit tier. The APR entered is treated as a flat input; your actual approved rate depends on your credit profile and the lender.
• Private-party sale differences. Maine applies use tax to private-party vehicle purchases similarly to dealer sales tax, but paperwork and payment mechanics differ from a dealer transaction.

• Confusing Maine's one-time sales tax with the annual municipal excise tax. The 5.5% figure modeled here is paid once at purchase; Maine vehicle owners also pay a separate annual excise tax to their municipality when registering, which is not part of this calculator's monthly loan payment.
• Assuming a lower monthly payment on a longer loan term means a better deal. Extending the term from 60 to 72 months lowers the payment shown but increases total interest paid over the life of the loan.
• Overlooking the trade-in tax credit available through licensed Maine dealers, which can meaningfully lower the actual tax bill compared to this calculator's straightforward price-times-rate estimate.
• Budgeting around the sticker price instead of the total out-the-door cost, which routinely leads to underestimating the loan amount needed.
• Not shopping the APR. Even a one-point difference in interest rate changes the monthly payment and total finance charge meaningfully over a 60-month term.

• Maine Revenue Services: Sales, use, and service provider tax rate schedules applicable to vehicle purchases.
• Maine Bureau of Motor Vehicles: Title, registration, and municipal excise tax guidance for passenger vehicles.
• Consumer Financial Protection Bureau: Guidance on auto loan financing, APR disclosure, and amortization mechanics under Regulation Z.