Say you got pre-approved this summer, when rates were sitting around 6.5%. You've been touring homes, getting a feel for the market, building a list. Then rates climb back above 7%, and the number you were comfortable with last month suddenly looks different.
That's what a lot of buyers across DC, Maryland, and Virginia are running into right now. And it's exactly why it helps to plan for a range of rates instead of one number.
Realtor.com pulled more than 20 years of mortgage rate data and turned it into a simple framework: how much cushion to build into your budget depending on how far out you are from closing. Here's how it works, and what it looks like on a DC Metro home.
How much can mortgage rates change before I buy a home? In about 80% of historical cases, according to Realtor.com's analysis of 20+ years of Freddie Mac data, the 30-year fixed rate moved by no more than about 100 basis points (one percentage point) up or down over 12 months, 75 basis points over six months, and 50 basis points over three months. Budgeting with the cushion built in helps keep a rate move from knocking you out of your home search.
Buying in the Next Year? Build In 100 Basis Points
Realtor.com compared each month's 30-year fixed rate to where it stood a year earlier, going back to 2000. The middle 80% of outcomes ranged from about -98 to +94 basis points. Round that and you get a number that's easy to remember: if you're a year out, plan for rates to land 100 basis points higher or lower than today.
Here's what that looks like on a $2,000 monthly principal and interest budget, with rates sitting around 7% today:
- At 6%, you could take on a loan of about $333,583
- At 8%, that drops to about $272,567
- The swing between those two comes to more than $60,000 in buying power
A $60,000 swing is real money anywhere. With the median home in DC Metro selling for $675,000 in June, it can be the difference between a home that fits your budget and one that doesn't.
Buying in the Next Six Months? Build In 75 Basis Points
Shrink the window and the range tightens. The middle 80% of six-month rate changes ran from -63 to +63 basis points, so the cushion rounds to 75.
For that same $2,000 monthly budget:
- At 6.25%, you could take on a loan of about $324,824
- At 7.75%, that falls to about $279,169
- The difference comes to more than $45,000 in buying power
Closing in the Next Three Months? Build In 50 Basis Points
Get close to closing and rates have less time to move. The middle 80% of three-month changes ran from -40 to +45 basis points, which rounds to 50.
For that same $2,000 monthly budget:
- At 6.5%, you could take on a loan of about $316,422
- At 7.5%, that drops to about $286,035
- The difference comes to about $30,000
What a Rate Move Looks Like on a DC Metro Home
Here's the same idea on a home at DC Metro's median sold price of $675,000 (Bright MLS, June 2026), with 10% down. That's a loan of $607,500. These numbers are principal and interest only, so taxes, insurance, and any HOA fees come on top.
- At 6.5%: about $3,840 a month, roughly $200 less than at 7%
- At 7%: about $4,042 a month
- At 7.5%: about $4,248 a month, roughly $206 more than at 7%
That's about $2,400 a year in either direction, from a half-point move. Not a reason to panic, but a good reason to know your number before you fall for a house.
What to Do Right Now to Protect Your Budget
Whichever window you're in, a few things are worth doing before you start touring:
- Run your numbers at more than one rate. Look at today's rate and at the high end of your cushion, so you know what you can still afford if rates keep climbing.
- Ask about your fallback options. A rate buydown, seller concessions, a different down payment, or a slightly different target price can all help if rates move against you.
- Pay down revolving debt where you can. It improves your debt-to-income ratio and gives you more room to work with.
Our preferred lender, Will Mitchell at First Savings, can walk you through these scenarios and what pre-approval looks like at different rates. [email protected] | 240-593-9200
Plan Now So You're Ready When You Find the Right Home
Building in this kind of room means a rate move won't knock you out of your search. You'll already know your range, so when you find a home you love in DC, Maryland, or Virginia, you can move on it with confidence.
If you're planning to buy in the next three, six, or twelve months, let's sit down and run your numbers before you start looking at homes. I'd rather help you plan for this now than have you find a place you love and hit a wall at the finish line.
FAQ: Mortgage Rates and Your Home Buying Budget
How much can mortgage rates change before I close on a home?
Based on Realtor.com's analysis of 20+ years of data, rates stayed within about 100 basis points over 12 months, 75 over six months, and 50 over three months in roughly 80% of historical cases.
What is a basis point?
A basis point is one hundredth of a percentage point, so 100 basis points equals 1%. A move from 7% to 7.5% is 50 basis points.
How much does a 1% rate change affect what I can afford?
On a $2,000 monthly principal and interest budget, the gap between a 6% rate and an 8% rate is more than $60,000 in loan size, according to Realtor.com's analysis.
Should I wait for lower mortgage rates before buying in DC Metro?
Nobody can predict where rates will land, and waiting has its own costs. A better approach is to budget with a cushion, so a rate move in either direction doesn't derail your plans.
Not sure how a rate move would change your budget in DC, Maryland, or Virginia? Edward Slavis and the team can run your numbers with you before you start looking at homes.
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