The South Dakota HELOC calculator estimate for a $50,000 home equity line of credit balance at today's MonitorBankRates South Dakota average HELOC rate of 7.38% is an interest only payment of about $308 a month during a 10 year draw period, rising to about $399 a month once a 20 year repayment period begins, or $349 interest only if the prime rate rises one point, verified by MonitorBankRates as of September 24, 2026.
Lenders serving South Dakota currently advertise HELOC rates from 6.25% to 7.75% across the 4 offers listed below. This calculator starts from South Dakota numbers: the MonitorBankRates South Dakota average HELOC rate and the Census median home value are already filled in. Enter the balance you expect to carry, test a rate change, or click a verified lender rate in the panel below to see the payments at that offer. The same $50,000 as a fixed rate home equity loan at the national average of 6.75% costs $442 a month over 15 years; see the South Dakota home equity loan calculator.
Use the home value for a South Dakota city
Loads the median home value for the city into the equity check. The rate stays at the MonitorBankRates South Dakota average.
South Dakota HELOC Payment Estimator
Prefilled with the MonitorBankRates South Dakota average HELOC rate and the median South Dakota home value. Results update as you type.
Monthly payment over the life of the line
Year by year
| Year | Phase | Monthly Payment | Interest Paid | Ending Balance |
|---|
Current South Dakota Average HELOC Rates
Today's MonitorBankRates South Dakota averages first, then the lowest verified HELOC offers from lenders serving South Dakota. Click any rate to run it through the calculator.
HELOC Offers in South Dakota and the Interest Only Payment on $50,000
Interest only payment on a $50,000 balance at each lender's current HELOC rate, from rate sheets published by the lender and verified by MonitorBankRates. Some rates are introductory; check the lender's terms for the rate after the intro period.
- Bluestone Federal Credit UnionHome Equity Line of Credit, APR 6.250%6.250%$260 a month interest only
- East River Federal Credit UnionHome Equity Line of Credit (HELOC), APR 6.750%6.750%$281 a month interest only
- Sentinel Federal Credit UnionHome Equity Line of Credit, APR 6.750%6.750%$281 a month interest only
- First Interstate BankHome Equity HELOC Special Offer, APR 7.750%7.750%$323 a month interest only
Compare every HELOC and home equity loan, local banks and credit unions first, on the South Dakota home equity rates page.
View Your South Dakota HELOC Rate
Personalized HELOC and home equity loan quotes from lenders serving South Dakota.
What a HELOC Costs in South Dakota Right Now
| $50,000 HELOC balance, 10 year draw, 20 year repayment | Rate | Interest only | Repayment |
|---|---|---|---|
| Prime down 2 points | 5.38% | $224 | $341 |
| Prime down 1 point | 6.38% | $266 | $369 |
| MonitorBankRates South Dakota average today | 7.38% | $308 | $399 |
| Prime up 1 point | 8.38% | $349 | $430 |
| Prime up 2 points | 9.38% | $391 | $462 |
| Prime up 3 points | 10.38% | $433 | $495 |
If the rate never changed, the $50,000 balance would cost about $82,705 in interest over the 30 year life of the line. The South Dakota average of 7.38% is above the U.S. average of 6.78%, a difference of about $25 a month in interest only payments on $50,000. The same $50,000 as a fixed rate home equity loan at the U.S. average of 6.75% costs $442 a month over 15 years, higher than the interest only payment but with the balance paid off and no rate risk. Existing HELOC rates change with the prime rate. Rates change daily; every figure on this page is recalculated when it loads from the current MonitorBankRates South Dakota average.
HELOC Payments by Balance in South Dakota
At the MonitorBankRates South Dakota average of 7.38%, 10 year draw and 20 year repayment. The last column shows whether the balance fits under an 80% combined loan to value limit on the median South Dakota home with a $142,000 first mortgage.
| Balance | Interest only payment | Repayment payment | Fits 80% CLTV on the median home |
|---|---|---|---|
| $25,000 | $154 | $200 | Yes |
| $50,000 | $308 | $399 | Yes |
| $75,000 | $461 | $599 | No, max about $63,900 |
| $100,000 | $615 | $798 | No, max about $63,900 |
| $150,000 | $923 | $1,197 | No, max about $63,900 |
| $200,000 | $1,230 | $1,597 | No, max about $63,900 |
HELOCs and Home Equity in South Dakota
How large a line you can get. The median South Dakota home is worth about $257,400. A homeowner who still owes 55% of that, $142,000, has $115,400 in equity. At the 80% combined loan to value cap most South Dakota banks and credit unions use, the largest credit line is about $63,900; lenders that allow 85% go to about $76,800. The line limit is not the balance: interest is charged only on what you draw.
Prime plus margin. HELOC rates in South Dakota are quoted as the prime rate plus a margin that depends on your credit and equity. When the Federal Reserve moves its target rate, banks move prime within days and your payment changes on the next cycle. Each one point move changes the interest only payment on $50,000 by about $42 a month. Many lenders advertise a low introductory rate for 6 to 12 months; run the calculator with the rate that applies afterward.
Home values and affordability. South Dakota scores 112.3 on the MBR Housing Affordability Index, ranking 16 of 51 states where 100 is the national average and higher is more affordable. See the South Dakota housing affordability page for the trend in home values that drives available equity.
How to Use the South Dakota HELOC Calculator
- Start from the South Dakota defaults
The rate is today's MonitorBankRates South Dakota average HELOC rate and the home value is the state median. Pick a city above if we track one near you.
- Enter the balance you expect to carry
Interest is charged only on what you draw. Set the draw and repayment periods to match the lender's terms; 10 and 20 years is the most common structure.
- Click a verified lender rate and test a rate change
The panel lists the lowest current HELOC offers from lenders serving South Dakota. Then enter how far prime might move to see both payments at that rate.
- Check your equity
Enter your mortgage balance to see the largest line most lenders would approve at an 80% combined loan to value limit.
Frequently Asked Questions About HELOCs in South Dakota
What is the average HELOC rate in South Dakota today?
The MonitorBankRates South Dakota average HELOC rate is 7.38% as of September 24, 2026, and the average home equity loan rate is 6.75%, computed every day from rates published by banks and credit unions lending in South Dakota. Individual lenders currently advertise HELOC rates from 6.25% to 7.75%, so compare offers on the South Dakota home equity rates page.
How much is the payment on a $50,000 HELOC in South Dakota?
At the MonitorBankRates South Dakota average of 7.38%, a $50,000 HELOC balance costs about $308 a month interest only during a 10 year draw period. When a 20 year repayment period begins the payment rises to about $399 a month. If the prime rate rises one point the interest only payment becomes $349.
Why does a HELOC payment jump after the draw period?
During the draw period most South Dakota lenders require only interest, so the balance never falls. When repayment begins the full balance is amortized over the repayment period, which adds principal to every payment. On $50,000 at 7.38% that is a move from $308 to $399 a month. Paying principal during the draw period or refinancing into a fixed rate home equity loan before the draw period ends avoids the jump.
How much can I borrow on a HELOC in South Dakota?
Most South Dakota lenders cap combined loan to value at 80%, some at 85% or 90%. On the median South Dakota home worth $257,400 with a $142,000 mortgage, that allows a line of up to about $63,900 at 80% or $76,800 at 85%. Lenders also review your credit score and debt to income ratio.
HELOC or home equity loan in South Dakota?
A HELOC suits expenses spread over time and carries a variable rate and a payment jump after the draw period. A home equity loan pays a lump sum at a fixed rate with a fixed payment. Today the MonitorBankRates averages are 7.38% for South Dakota HELOCs and 6.75% for home equity loans; $50,000 costs $308 a month interest only on a HELOC versus $442 as a 15 year fixed loan. Existing HELOC rates change with the prime rate; home equity loan rates do not.
Do South Dakota HELOCs have fees?
Many banks and credit unions charge no closing costs on a HELOC but require the line to stay open two or three years to avoid an early closure fee. Others charge an appraisal, origination or annual fee. Introductory rates for the first 6 to 12 months are common; the calculator should use the rate that applies afterward.
What credit score do I need for a HELOC?
Most lenders want a score of at least 620 to 680, with the lowest margins over prime going to borrowers above 740. Lenders also want a debt to income ratio under about 43% counting the new payment, and enough equity to stay under their combined loan to value cap.
HELOC Calculators for Other States
Each state page starts from that state's MonitorBankRates average HELOC rate and median home value. The national HELOC calculator compares the payment at every state's average.
