The Montana HELOC calculator estimate for a $50,000 home equity line of credit balance at today's MonitorBankRates Montana average HELOC rate of 7.28% is an interest only payment of about $303 a month during a 10 year draw period, rising to about $396 a month once a 20 year repayment period begins, or $345 interest only if the prime rate rises one point, verified by MonitorBankRates as of September 24, 2026.
Lenders serving Montana currently advertise HELOC rates from 5.50% to 7.00% across the 5 offers listed below. This calculator starts from Montana numbers: the MonitorBankRates Montana 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 Montana average of 6.37% costs $432 a month over 15 years; see the Montana home equity loan calculator.
Use the home value for a Montana city
Loads the median home value for the city into the equity check. The rate stays at the MonitorBankRates Montana average.
Montana HELOC Payment Estimator
Prefilled with the MonitorBankRates Montana average HELOC rate and the median Montana 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 Montana Average HELOC Rates
Today's MonitorBankRates Montana averages first, then the lowest verified HELOC offers from lenders serving Montana. Click any rate to run it through the calculator.
HELOC Offers in Montana 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.
- Billings Federal Credit UnionHome Equity Line of Credit, APR 5.500%5.500%$229 a month interest only
- Altana Federal Credit UnionHome Equity Line of Credit - Variable, APR 6.500%6.500%$271 a month interest only
- The Family First Federal Credit UnionHome Equity Line of Credit-variable rate, current rate shown, APR 6.750%6.750%$281 a month interest only
- SEG Federal Credit UnionHome Equity HELOC Loans, APR 7.000%7.000%$292 a month interest only
- 1st Liberty Federal Credit UnionHome Equity Line of Credit (HELOC), APR 7.000%7.000%$292 a month interest only
Compare every HELOC and home equity loan, local banks and credit unions first, on the Montana home equity rates page.
View Your Montana HELOC Rate
Personalized HELOC and home equity loan quotes from lenders serving Montana.
What a HELOC Costs in Montana Right Now
| $50,000 HELOC balance, 10 year draw, 20 year repayment | Rate | Interest only | Repayment |
|---|---|---|---|
| Prime down 2 points | 5.28% | $220 | $338 |
| Prime down 1 point | 6.28% | $262 | $366 |
| MonitorBankRates Montana average today | 7.28% | $303 | $396 |
| Prime up 1 point | 8.28% | $345 | $427 |
| Prime up 2 points | 9.28% | $387 | $459 |
| Prime up 3 points | 10.28% | $428 | $492 |
If the rate never changed, the $50,000 balance would cost about $81,451 in interest over the 30 year life of the line. The Montana average of 7.28% is above the U.S. average of 6.78%, a difference of about $21 a month in interest only payments on $50,000. The same $50,000 as a fixed rate home equity loan at the Montana average of 6.37% costs $432 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 Montana average.
HELOC Payments by Balance in Montana
At the MonitorBankRates Montana average of 7.28%, 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 Montana home with a $207,000 first mortgage.
| Balance | Interest only payment | Repayment payment | Fits 80% CLTV on the median home |
|---|---|---|---|
| $25,000 | $152 | $198 | Yes |
| $50,000 | $303 | $396 | Yes |
| $75,000 | $455 | $594 | Yes |
| $100,000 | $607 | $792 | No, max about $93,600 |
| $150,000 | $910 | $1,188 | No, max about $93,600 |
| $200,000 | $1,213 | $1,584 | No, max about $93,600 |
HELOCs and Home Equity in Montana
How large a line you can get. The median Montana home is worth about $375,800. A homeowner who still owes 55% of that, $207,000, has $168,800 in equity. At the 80% combined loan to value cap most Montana banks and credit unions use, the largest credit line is about $93,600; lenders that allow 85% go to about $112,400. The line limit is not the balance: interest is charged only on what you draw.
Prime plus margin. HELOC rates in Montana 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. Montana scores 93.4 on the MBR Housing Affordability Index, ranking 34 of 51 states where 100 is the national average and higher is more affordable. See the Montana housing affordability page for the trend in home values that drives available equity.
How to Use the Montana HELOC Calculator
- Start from the Montana defaults
The rate is today's MonitorBankRates Montana 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 Montana. 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 Montana
What is the average HELOC rate in Montana today?
The MonitorBankRates Montana average HELOC rate is 7.28% as of September 24, 2026, and the average home equity loan rate is 6.37%, computed every day from rates published by banks and credit unions lending in Montana. Individual lenders currently advertise HELOC rates from 5.50% to 7.00%, so compare offers on the Montana home equity rates page.
How much is the payment on a $50,000 HELOC in Montana?
At the MonitorBankRates Montana average of 7.28%, a $50,000 HELOC balance costs about $303 a month interest only during a 10 year draw period. When a 20 year repayment period begins the payment rises to about $396 a month. If the prime rate rises one point the interest only payment becomes $345.
Why does a HELOC payment jump after the draw period?
During the draw period most Montana 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 7.28% that is a move from $303 to $396 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 Montana?
Most Montana lenders cap combined loan to value at 80%, some at 85% or 90%. On the median Montana home worth $375,800 with a $207,000 mortgage, that allows a line of up to about $93,600 at 80% or $112,400 at 85%. Lenders also review your credit score and debt to income ratio.
HELOC or home equity loan in Montana?
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 7.28% for Montana HELOCs and 6.37% for home equity loans; $50,000 costs $303 a month interest only on a HELOC versus $432 as a 15 year fixed loan. Existing HELOC rates change with the prime rate; home equity loan rates do not.
Do Montana 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.
