What happens to your mortgage when interest rates rise

When the Federal Reserve raises interest rates, the cost of borrowing money goes up across the economy. If you have a fixed-rate mortgage, your monthly payment stays the same for the life of the loan — a rate hike does not change what you already owe. But if you have an adjustable-rate mortgage (ARM), your rate can reset to a higher number when your fixed period ends, which means your payment jumps. If you are shopping for a new mortgage, lenders charge higher rates to new borrowers, so the same house costs more to finance.

The timing matters. A homeowner who locked in a 3 percent rate two years ago pays far less per month than someone buying the same house today at 7 percent. Over a 30-year loan, that difference adds up to tens of thousands of dollars in extra interest. Renters are affected differently — landlords often pass higher borrowing costs along as rent increases, but the effect is delayed and indirect.

Key Takeaways

  • Fixed-rate mortgages are not affected by rate hikes, but adjustable-rate mortgages reset to higher rates when the fixed period ends, raising your monthly payment.
  • New homebuyers face higher interest rates when ready, which increases the total cost of financing a home and may reduce how much house they can afford.
  • Home values can decline when rates rise because fewer buyers can afford mortgages, which affects your equity and refinancing options.
  • Homeowners with adjustable-rate mortgages should review their loan documents to learn when their rate adjusts and what the cap is.
  • Refinancing to lock in a lower rate becomes less attractive when rates are rising, but may still make sense if you have an ARM approaching its adjustment date.

How rate hikes affect home prices and your equity

Higher interest rates reduce demand for homes because monthly payments become unaffordable for more buyers. When fewer people can borrow at the new rate, sellers often lower prices to attract offers. This can hurt homeowners who bought near a market peak — your home may be worth less than you paid, even though you still owe the full mortgage balance. This situation is called being "underwater" on your loan.

The decline is not when ready or uniform. Markets with high prices and many first-time buyers tend to cool faster than markets with lower prices or more cash buyers. A home in an expensive coastal city might drop 10 to 15 percent in value during a rate-hiking cycle, while a home in a lower-cost area might hold steady or decline only 2 to 3 percent. Your local real estate market, not the national average, determines what happens to your equity.

Adjustable-rate mortgages and payment shock

An adjustable-rate mortgage typically starts with a low fixed rate for three, five, seven, or ten years. After that period ends, the rate adjusts periodically — often every year or every six months — based on a market index plus a margin set by your lender. If you took out a 5/1 ARM at 3 percent in 2021, your rate stayed at 3 percent for five years. When year six arrived, your lender recalculated your rate using the current index, and it might have jumped to 6 or 7 percent.

The shock comes in the payment. A $300,000 loan at 3 percent costs about $1,265 per month. That same loan at 6 percent costs about $1,799 per month — an extra $534 every month. Most ARMs include a cap on how much the rate can rise at each adjustment and over the life of the loan, but caps vary widely. Review your loan documents or contact your lender to find out your specific caps and adjustment dates. If an adjustment is coming within the next year or two, now is the time to plan.

Refinancing becomes harder and more expensive

Refinancing means taking out a new loan to pay off your old one, usually to get a lower rate or change your loan terms. When rates are rising, refinancing makes less sense because the new rate is unlikely to be lower than what you already have. If you have a 4 percent fixed mortgage and rates are now at 7 percent, refinancing locks you into a worse deal. The only exception is if you have an ARM about to adjust and you want to convert to a fixed rate before the adjustment happens — even at a higher rate, a fixed payment may be preferable to the uncertainty of future adjustments.

Refinancing also costs money. You pay closing costs — typically 2 to 5 percent of the loan amount — for appraisals, title work, and lender fees. If your home has lost value since you bought it, the appraisal may come in lower than your loan balance, and some lenders will not refinance in that situation. If you do refinance, you need to recoup the closing costs through monthly savings before the refinance makes financial sense. With rates rising, that payback period stretches longer or disappears entirely.

How rising rates affect home equity lines of credit

A home equity line of credit (HELOC) is a second loan against your home that works like a credit card — you borrow what you need, up to a limit, and pay interest only on what you use. Many HELOCs have variable rates that adjust with market conditions. When the Federal Reserve raises rates, HELOC rates rise too, often within 30 to 60 days. If you were paying 4 percent on a HELOC and rates jump to 8 percent, your monthly payment on borrowed money doubles.

HELOCs also have a draw period and a repayment period. During the draw period — often 10 years — you can borrow and repay flexibly. When the draw period ends, the HELOC closes and you enter the repayment period, where you can no longer borrow and must pay off the balance, usually over 10 to 20 years. If your HELOC is entering its repayment period during a high-rate environment, your payment will jump significantly. Check your HELOC documents to see when your draw period ends and what your rate structure is.

Steps to take if you have an adjustable-rate mortgage

Start by finding your loan documents or calling your lender to confirm three things: your current rate, your adjustment date, and your rate cap. Your adjustment date tells you how much time you have to plan. Your rate cap tells you the worst-case scenario — even if rates spike, your new rate cannot exceed this number. Write these down and set a calendar reminder for six months before your adjustment date.

Next, run the numbers. Use an online mortgage calculator to see what your payment would be at your cap rate. If that payment is unaffordable, you have three options: refinance now into a fixed-rate mortgage (even at a higher rate, if it locks in certainty), make extra payments to reduce your balance before the adjustment, or plan to sell before the adjustment happens. If the payment is manageable, you can wait and see where rates are closer to your adjustment date — rates sometimes fall, which would lower your new rate.

If you are considering refinancing, get quotes from at least three lenders and compare the total cost, not just the rate. A lender offering 0.25 percent lower than another might charge higher closing costs, making the deal worse overall. Ask each lender to provide a Loan Estimate, which shows the rate, closing costs, and monthly payment side by side.

What homeowners should monitor going forward

The Federal Reserve does not set mortgage rates directly, but its actions influence them. When the Fed raises its benchmark rate, mortgage rates typically follow within days or weeks. You can track Fed decisions through the Federal Reserve's website or financial news outlets. Mortgage rates also respond to inflation data, employment reports, and economic forecasts, so they move even on days the Fed does not meet.

If you are a homeowner with a fixed-rate mortgage and no plans to move or refinance, rate hikes have little direct impact on you. Your payment stays the same. But if you plan to sell, buy another home, or refinance, pay attention to rate trends. If you have an ARM or HELOC, set reminders for key dates and review your options at least six months before any adjustment. The more time you have to plan, the more options you have.

Frequently Asked Questions

Will my fixed-rate mortgage payment go up if interest rates rise?

No. A fixed-rate mortgage locks your interest rate and monthly payment for the entire loan term — 15, 20, or 30 years. Interest rate hikes do not change your payment. The only exception is if your loan includes an escrow account for property taxes and insurance; those can rise independently of interest rates.

What is the difference between a fixed-rate and adjustable-rate mortgage?

A fixed-rate mortgage has one interest rate for the life of the loan. An adjustable-rate mortgage starts with a lower fixed rate for a set period, then adjusts periodically based on market conditions. ARMs are riskier because your payment can increase significantly, but they offer lower initial payments. Most homebuyers choose fixed-rate mortgages to avoid payment uncertainty.

Can I lock in a lower rate before my ARM adjusts?

Yes, by refinancing into a fixed-rate mortgage. However, if current rates are higher than your ARM's current rate, refinancing locks you into a worse deal. It only makes sense if you want certainty and can afford the higher payment, or if your ARM's adjustment would be even higher. Get quotes from multiple lenders to compare costs.

How much will my home be worth if interest rates keep rising?

Home values depend on local supply and demand, not national rates alone. Generally, rising rates reduce buyer demand and can lower prices, but the timing and amount vary by market. A home in a desirable area with limited inventory may hold value better than one in a slower market. Check your local real estate market trends rather than relying on national forecasts.

Should I pay off my mortgage faster if rates are rising?

That depends on your situation. If you have an ARM approaching adjustment, paying down the balance reduces the amount subject to the higher rate, which lowers your new payment. If you have a fixed-rate mortgage, paying extra is a personal choice based on your other financial goals — it is not urgent because your rate will not change. Consider whether you have high-interest debt, an emergency fund, or other priorities first.