How rising interest rates affect your HELOC payments and what you can do about it

If you have a home equity line of credit (HELOC), you might have noticed your monthly payment changing, especially when interest rates rise.

That’s because most HELOCs have variable interest rates tied to broader market conditions. When rates increase, your borrowing costs may increase, too. For many homeowners, that can make budgeting feel less predictable

The good news is that these changes aren’t random. They follow a structure built into your loan. Understanding how HELOC rates work and what you can do in response could help you plan with more confidence.

Most HELOCs have variable interest rates tied to an index (commonly the Prime Rate) plus a margin set by your lender.

Here’s a simple way to think about it:

• Index: A benchmark interest rate used to determine loan rates
• Prime Rate: A widely used benchmark that tends to move with broader economic conditions
• Margin: A fixed percentage added to the index based on your credit profile and loan terms

Similar to an adjustable-rate mortgage (ARM), a variable-rate HELOC may adjust over time as the index changes. Depending on your agreement, this could happen monthly or quarterly. 

Most HELOC payments increase when interest rates rise because they are tied to a variable index such as the Prime Rate.

When that index increases, your HELOC rate may increase as well, which raises the interest portion of your payment.

These changes are not arbitrary. They are defined in your original loan agreement, and different HELOCs may behave slightly differently depending on their structure.

In short: 

• Most HELOCs have variable rates
• Rate increases can raise your interest costs
• Your loan agreement outlines how and when adjustments occur

Variable-rate HELOCs typically adjust on a recurring schedule, often monthly or quarterly, based on changes in the underlying index (a benchmark interest rate used to set your rate).

Your loan agreement defines how frequently adjustments occur and what triggers them. If the index rises, your rate may increase. If it falls, your rate may decrease.

If your HELOC has a variable rate, a rate increase may raise the interest portion of your monthly payment. The impact depends on your balance, rate and where you are in your loan term.

During the draw period, payments may increase primarily due to higher interest. During the repayment period, when payments include both principal and interest, the impact may be more noticeable. For example: 

Even a small rate change could affect monthly costs. Understanding how your balance and rate interact can help you plan ahead.

Payment example assumes a $50,000 outstanding balance during the draw period with interest-only monthly payments. Estimated monthly interest payments are based on an APR of 7.00% before the rate increase and 8.00% after the rate increase. Actual payment amounts may vary.

If your payment rises, there are practical steps you can take to manage the impact:

• Review your monthly budget to understand where you may have flexibility
• Pay down principal when possible to potentially reduce interest paid over time
• Ask about fixed-rate conversion options, if available

If you’re unsure which option fits your situation, it may help to connect with an M&T representative to review your current terms and discuss potential strategies. 

In a rising-rate environment, different borrowing options may offer different advantages. 

A HELOC offers flexibility, while a fixed-term home equity loan may provide more stability. The right choice depends on your financial goals and comfort with changing payments.

• Most HELOCs have variable rates tied to an index.
• Payments may increase as interest rates rise.
• Adjustment timing and limits are defined in your agreement.
• Budgeting and repayment strategies can help manage changes.
• Fixed-rate options may offer more predictability.

If you’d like to explore your options, you can learn more about M&T’s HELOC options or connect with an M&T specialist to discuss what may work best for your financial goals.