What Is a Perc Test—and Why Can It Make or Break a Land Purchase?By John S. Wagner, Affiliate Broker/Realtor®Weichert, Realtors® - Saxon ClarkServing Kingsport, Johnson City, Bristol,
💰 Interest Rates & Buying Power: The Basics
Dated: June 7 2025
Views: 39
Understanding how interest rates affect buying power is crucial in real estate—because even a small rate change can significantly impact how much home you can afford.
💰 Interest Rates & Buying Power: The Basics
🔢 What Is Buying Power?
Buying power is the amount of home you can afford to purchase based on your monthly budget and mortgage rate. It's directly tied to interest rates—as rates go up, buying power goes down.
📉 How Higher Interest Rates Reduce Buying Power
Higher rates = higher monthly payments
The more you pay in interest, the less you can borrow
This means you may have to buy a less expensive home or put more money down
📊 Example:
| Interest Rate | Loan Amount | Monthly Payment (P&I) |
|---|---|---|
| 5.0% | $400,000 | ~$2,147 |
| 6.0% | $400,000 | ~$2,398 |
| 7.0% | $400,000 | ~$2,661 |
🧠 With a $2,400 monthly budget, a rate increase from 5% → 7% reduces the loan amount you qualify for by tens of thousands of dollars.
🚀 How Lower Interest Rates Increase Buying Power
Lower rates mean lower monthly payments
You can qualify for a larger mortgage with the same income
More room in your budget = more home, better location, or higher-end features
🏠 Why It Matters in Real Estate
🔺 When Rates Rise:
Buyer demand may cool off
Sellers may need to reduce prices
Buyers may face tighter affordability
🔻 When Rates Fall:
More buyers enter the market
Competition increases (bidding wars)
Prices may rise due to demand
💡 Pro Tip: Lock It In
If you’re under contract on a home, ask your lender about a rate lock to protect you from rising rates during closing.
🧠 Final Thought:
Even a 1% change in interest rates can mean thousands of dollars in added cost per year. That’s why watching interest rates—and acting strategically—is key to maximizing your real estate investment.
John Wagner
John is a dedicated real estate professional serving the Tri-Cities of Northeast Tennessee.John was born and raised in Kingsport, Tennessee, and is a graduate of Sullivan Central High School. Although....
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