South Dakota Mortgage Refinance Calculator

By SoFi Editors | Updated November 21, 2025

A South Dakota mortgage refinance calculator can greatly assist you in estimating your potential savings and associated costs, making the decision of whether refinancing is the right choice for you much easier to navigate. To use the calculator, enter the details on your current home loan and compare those numbers with what you would pay on a new, refinanced loan. You’ll then see your new estimated monthly payments and how much you could save in interest over time.

Keep reading for more on how to use the South Dakota mortgage refinance calculator and whether or not refinancing is right for you.

Key Points

•   A South Dakota mortgage refinance calculator can estimate potential savings and costs, plus help you figure out the break-even point.

•   To use the calculator, enter information about your old loan and your ideal new loan. The calculator will then tell you your new monthly payment and interest savings.

•   The break-even point is the number of months required for your savings to cover the initial refinancing costs.

•   Mortgage refinancing costs typically range from 2% to 5% of the loan amount, and should be considered when deciding whether or not to refinance.

•   A higher credit score, ideally 740 or above, can lead to more favorable refinancing terms and lower interest rates.



South Dakota Mortgage Refinance Calculator


Calculator Definitions

•   Remaining loan balance: The remaining loan balance is the principal amount you still owe on your home loan.

•   Current/New interest rate: Interest is the percentage of the loan amount charged by the lender. The current interest rate is what you’re now paying, and may be fixed or variable. The new interest rate can significantly affect your monthly payments and total interest paid.

•   Remaining/New loan term: The remaining loan term is the number of months left on your current mortgage. The new loan term is the duration of the refinanced loan. Consider the trade-offs between shorter and longer terms.

•   Points: Mortgage points, or discount points, allow you to prepay a portion of the interest at closing. Each point costs 1% of the loan amount and can reduce your interest rate.

•   Other costs and fees: Other costs include origination, appraisal, and attorney fees. These typically range from 2% to 5% of the loan amount.

•   Monthly payment: Your monthly payment includes the principal and interest. Use the South Dakota mortgage refinance calculator to estimate the impact of different rates and terms.

•   Total interest: Total interest is the cumulative cost paid to the lender over the loan’s life. Compare your current total interest with the projected total interest for the refinanced loan.