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If you're paying 3%, or possibly less, on your current mortgage, would you be willing to trade that rate for today's rates, which average closer to 7%?
The answer for most homeowners in this situation is no. They'd rather stay in a home that no longer suits them than take on a new loan at today's rates. This, in a nutshell, explains the "lock-in effect."
But the number of homeowners who have to give up their historically low rate is growing. Whether it's a new job in a new city or family changes, they need a new home which means a new mortgage rate.
Let's look at the math these borrowers face.
...in as little as 3 minutes — no credit impact
The cost of trading your mortgage
According to recent housing data, roughly 70% of US homeowners with a mortgage have a rate below 6% — and a large segment of those are sitting at 2%–3.5%, locked in during the 2020–2022 refinancing wave.
Giving up a 2.8% rate feels wrong, and the payment math confirms why.
Here is what the monthly principal and interest payment looks like at a 2.8% rate on common loan balances and what the new payment would look like buying at today's rate of 6.37% on a slightly larger home.
| Current loan balance | Monthly P&I at 2.8% | New purchase price | New P&I at 6.37% (20% down) | Monthly increase |
|---|---|---|---|---|
| $250,000 | ~$1,030 | $350,000 | ~$1,748 | ~$718 |
| $350,000 | ~$1,441 | $450,000 | ~$2,248 | ~$807 |
| $400,000 | ~$1,648 | $500,000 | ~$2,497 | ~$849 |
| $500,000 | ~$2,059 | $650,000 | ~$3,247 | ~$1,188 |
Example is for illustrative purposes only. Rates, payments, and total interest will vary based on credit profile, loan terms, and market conditions. New purchase prices are illustrative estimates — actual prices will vary by market.
These are not small numbers. An $800–$1,200 monthly increase is a real and significant change to a household budget. It is the primary reason agents are reporting sellers pulling listings, postponing planned moves, and deciding to "wait another year," even when the underlying life reason to move hasn't changed.
What you're giving up by not selling
So, what does waiting for rates to get lower before selling your home actually cost? It depends on what you're waiting in. If your home still fits your life — right size, right city, right commute, right school district — the math favors staying.
But if you're putting off a job relocation that would advance your career, staying in a two-bedroom with a third child on the way, managing a post-divorce living situation, or simply spending every day in a city you've been ready to leave for three years, the cost of staying is real even if it doesn't appear in the bank account.
There's also an equity dimension. Recent housing data shows that homeowners who bought or refinanced in 2020–2022 have often accumulated significant equity. In some markets, homeowners have built up six-figure equity because home prices rose sharply during that period.
That equity could be invested in a more expensive home if not for the fear of taking on a higher rate.
When the math says sell anyway
There are times when a monthly payment increase is worth absorbing, assuming you can qualify for the loan.
Here is how to think about the four most common scenarios:
Serious job relocation
If relocating means a material salary increase (say $25,000–$40,000 per year more) a $900–$1,100 monthly payment increase is directly offset by the income improvement.
You are not losing money by moving; you are reallocating money from mortgage savings to income gains, and the math often nets positive within the first year.
The only question is whether you want to stay in your current home and commute, rent it out, or sell. Each path has different tax and cash flow implications worth modeling before you decide.
Meaningful family size change
Moving from a two-bedroom to a four-bedroom costs money. But so does staying in the wrong house.
Cramped space, lack of privacy, inadequate school choices, or the friction of a home that doesn't match your family's day-to-day life has its own form of cost.
The monthly cost of the upgrade is real; so is the daily quality-of-life benefit. This is ultimately a personal values calculation, but the math framework helps you at least see the full picture before deciding.
Divorce or separation
When two people separate, the math often forces the issue regardless of the mortgage rate. If one party cannot afford to buy out the other at today's rates, selling is frequently the only practical resolution.
The rate you're leaving behind matters less than the necessity of dividing the asset cleanly. Understanding what is home equity and how it will be split is the essential first calculation.
Significant equity unlock
This is where the rate lock calculus changes most dramatically. If you have $300,000 or more in equity, selling unlocks that capital, and applying a large down payment to the next home fundamentally changes the payment picture.
Consider a homeowner selling a home with $350,000 in equity. If they buy a $600,000 home and put $350,000 down (58% down), their loan is $250,000. At 6.37% on a 30-year loan, the monthly payment is approximately $1,560 — meaningfully lower than the 6.37% payment on a $480,000 loan with 20% down ($2,996).
The equity acts as a rate compressor. The starting rate didn't change, but the loan size did, and that changes everything.
...in as little as 3 minutes — no credit impact
When the math says wait
Staying is the right answer more often than the housing industry would have you believe. Here are the scenarios where the numbers genuinely favor holding your position.
You're moving for reasons that could be solved another way. If you want more space for a home office, a renovation funded by a home equity line of credit (HELOC) may accomplish what a move would — without the transaction costs, the higher rate, or the disruption.
The next home doesn't improve your situation. If you're considering a lateral move — same size, similar neighborhood, no material life improvement — the transaction costs alone (typically 6%–10% of the purchase price when you factor in agent commissions, closing costs, and moving expenses) make a compelling case for staying put.
You're primarily reacting to market anxiety. Some homeowners feel pressure to move because everyone around them seems to be moving, or because they're afraid prices will go even higher. Neither is a sufficient reason to absorb an $800+ monthly payment increase.
You think rates may improve. Nobody can anticipate the direction interest rates will take in a year or two. But if rates were to fall, a 1% rate improvement on a $500,000 purchase could reduce the new payment by $300 or so. If you can afford to wait and have no urgent life reason to move, patience has a real dollar value.
How to make the decision
Rather than letting this remain an abstract question, here is a practical framework.
Step 1: Confirm your mortgage payment on your statement. Note your remaining balance, not the original loan amount.
Step 2: Set your purchase price. What would the next home actually cost? In your target market, at the size and quality level that upgrades your current home.
Step 3: Estimate your new monthly payment at today's rates. Input your target price, your likely down payment (your current equity after transaction costs, plus any additional cash). See current mortgage rates for the latest average rates to put in.
Step 4: Calculate the cost. The difference between step one and step three is your monthly cost of moving. Write it down. It is probably between $600 and $1,500 per month.
Step 5: **Ask whether the life benefit of the move is worth the monthly cost. If yes, the math supports moving.
If you're not so sure, that uncertainty is probably telling you something.
Qualifying is a big piece of the puzzle
What rate would you qualify for? That could make a big difference in the math above.
Pre-approval tells you the loan amount you qualify for based on your real credit, income, and debt load.
It's not the same as a Loan Estimate, but it is based on your numbers and not on hypothetical data.
...in as little as 3 minutes – no credit impact
Frequently asked questions
I have a 2.8% mortgage. How much more would I pay per month if I sell and buy at today's rates?
This depends on your current loan balance and what you'd pay for the next home. As a benchmark: a homeowner with a $400,000 balance at 2.8% pays roughly $1,648 per month in principal and interest. Buying a $500,000 home at 6.37% with 20% down produces a payment of approximately $2,497 — an increase of about $849 per month.
Is it ever worth selling a home with a low interest rate, or should I just stay put forever?
Yes. It could be worth selling when the life benefit of moving clearly exceeds the monthly cost of a higher rate, or when life circumstances force the issue regardless of rate. Serious job relocation, family size change, divorce, or a situation where large equity can be applied to the next purchase are all scenarios where the math often supports moving.
We need more space for a second child but have a 3.1% mortgage. Does the math support upgrading now?
Possibly, but it depends on the payment delta and your budget. If upsizing from a two-bedroom to a four-bedroom means your monthly payment increases by $700–$900, that is a real number. But it may be comparable to, or less than, the cost of childcare, private school, or the quality-of-life friction of being undersized. Run the exact numbers for your market and your income. The question isn't whether there's a cost — there is — but whether the cost is one you can absorb and whether the benefit justifies it.
I have $320,000 in equity. How does that change what I'd pay on a new home?
Significantly. If you sell, net your equity after transaction costs, and apply a large down payment to the next purchase, you're borrowing much less. This offsets some of the rate increase. On a $600,000 home with $300,000 down, your loan is $300,000. At 6.37%, that's roughly $1,873 per month in principal and interest. Compare that to buying the same home with 20% ($120,000) down. Your loan is $480,000 and the payment is $2,997. The equity acts as a direct rate compressor.
What are the real full costs of selling and buying a new home in 2026, beyond the mortgage rate?
Transaction costs are significant and often overlooked at first. On the sell side: agent commissions (typically 2%–3% of sale price), title fees, transfer taxes, and potential repairs or concessions can run 4%–8% of your home's sale price. On the buy side: closing costs typically add 2%–5% of the purchase price. On a combined $500,000 transaction, total friction costs can easily run $30,000–$60,000 before the first payment on the new mortgage.
My company wants me to relocate. Is a career move worth giving up a 2.9% mortgage?
It depends on the income differential and how long you'd own the next home. If the relocation comes with a $30,000–$50,000 salary increase, a $900 monthly payment increase is offset within the first year of the new salary, and the career trajectory may compound that advantage for years. If the relocation is lateral, the math is tighter and you'd want to model it carefully. The useful question is: what is the 5-year financial and career picture in both scenarios?
If I sell now and rates drop later, can I refinance to a lower rate?
Yes. Refinancing is always an option if rates improve meaningfully after you buy. The general guidance is that refinancing makes sense when the rate drop is large enough to recoup the closing costs within a reasonable period — typically called the break-even timeline. A 1% rate improvement on a $400,000 loan saves roughly $250 per month; if closing costs run $5,000–$8,000, you'd break even in 20–32 months. If you plan to own the next home long-term, today's rate is not permanent. It's a starting point.
Ready to move on from historically low rate?
A sub-3% mortgage is a genuinely valuable asset. Giving it up can hurt. At the same time, staying in a home that no longer fits your life has costs too. They're just not charged in monthly payments.
The homeowners who make this decision well are the ones who do the full math on both sides: the monthly payment delta, the equity they'd unlock, the transaction costs they'd absorb, and the honest value of what they'd gain by moving. The ones who struggle tend to focus only on the rate they'd be leaving behind.
If you're considering a move, the fastest way to get out of the hypothetical and into a real decision is a pre-approval. It tells you exactly what you'd qualify for at today's rates, what the payment would actually be, and whether the life benefit you're weighing is financially within reach.
...in as little as 3 minutes — no credit impact