Loans · SD

Auto Loan Calculator — South Dakota

Estimate a car payment in South Dakota, with sales tax prefilled at the 4.2% state rate. In most states the tax applies to the price after your trade-in. Adjust the price, down payment, and term to fit your deal.

Your details

Vehicle price$Sticker/negotiated price before tax.Down payment$Cash you pay up front.Trade-in value$Credit for your old vehicle. In most states it also lowers the taxable amount.Sales tax%State/local sales tax on the price net of trade-in.APR%Loan term

Monthly payment

$623.14

Amount financed: $31,470.00
Sales tax: $1,470.00
Total interest: $5,918.62
Total cost (with down payment): $42,388.62

Financed amount vs interest vs tax

Amount financed: $31,470.0081%
Interest: $5,918.6215%
Sales tax: $1,470.004%

Monthly payment$623.14

Sources & methodology

Sales tax prefilled with South Dakota's state general rate (4.2%). Some states apply special motor-vehicle rates or caps, and local taxes may add on top. Rate is the Tax Foundation 2025 state sales tax rate, verified 2026-07-20; local city/county taxes may add on top. Sales tax is applied to the price net of trade-in (typical US rule). Estimates only — dealer fees and registration are not included.

•Tax Foundation — 2025 state sales tax rates — Tax Foundation
•Consumer Financial Protection Bureau — auto loans — CFPB

Estimates for informational purposes only — not tax or financial advice. Local rates vary. Last updated: 2026-07-20

Your details

Financed amount vs interest vs tax

Sources & methodology

Auto Loan Calculator by state