5/1 ARM vs 7/1 ARM
Last updated July 2026
5/1 ARM
Adjustable-rate mortgage with 5 years of fixed rate before annual adjustments
Advantages
- Lowest initial rate among common ARMs, typically 0.25-0.50% below 7/1
- Ideal if you plan to sell or refinance within 5 years
- Rate caps limit how much your rate can jump per adjustment and over the loan life
- Can qualify for a larger loan amount thanks to lower initial rate
Drawbacks
- Only 5 years of certainty before adjustments begin
- Payment shock if you don't refinance or sell before adjustment
- Rate caps still allow substantial increases (typically 5-6% over loan life)
- Complex product with caps, indices, and margins to understand
7/1 ARM
Adjustable-rate mortgage with 7 years of fixed rate before annual adjustments
Advantages
- 7 years of rate certainty before annual adjustments
- Lower initial rate than fixed mortgages (typically 0.25-0.50% below fixed)
- Extra 2 years of buffer versus 5/1 to sell or refinance
- Rate caps still limit adjustment magnitude
Drawbacks
- Initial rate slightly higher than 5/1
- Still adjusts annually after year 7, payment risk remains
- Less common than 5/1, may have fewer lender options
- Rate caps allow substantial increases post-adjustment
5/1 and 7/1 ARMs are the two most common adjustable-rate mortgage products. Both offer a lower initial rate than a fixed mortgage for a fixed period (5 or 7 years) before adjusting annually. The 5/1 has the lowest initial rate; the 7/1 gives you two more years of certainty before adjustment. Expected ownership horizon usually decides it.
Feature Comparison
| Feature | 5/1 ARM | 7/1 ARM |
|---|---|---|
| Rate Structure | Fixed 5 years, then adjusts annually | Fixed 7 years, then adjusts annually |
| Common Loan Terms | 5/1 ARM (5-year fixed, 1-year adjustments) | 7/1 ARM (7-year fixed, 1-year adjustments) |
| Initial Interest Rate | Typically 0.25-0.50% below 7/1 ARM | Typically 0.25-0.50% above 5/1 ARM |
| Rate Adjustment Schedule | Annual after year 5 | Annual after year 7 |
| Payment Predictability | Fully predictable for 5 years | Fully predictable for 7 years |
| Borrower Rate Risk | Adjustment risk begins at year 6 | Adjustment risk begins at year 8 |
| Refinance Trigger | Before year 6 to avoid adjustment | Before year 8 to avoid adjustment |
| Qualifying Loan Amount | Larger than fixed thanks to lower initial rate | Slightly smaller than 5/1 due to higher initial rate |
Too Close to Call
5/1 wins for buyers certain they'll sell or refinance within 5 years. 7/1 wins for buyers who want ARM savings but need a longer runway before adjustment risk.
Pick the ARM whose fixed period matches your realistic ownership horizon. If you're a job-mobile professional who expects to move in 3-5 years, 5/1 gives you the lowest rate and no adjustment risk. If you're a young family planning to stay 5-8 years but want ARM savings, 7/1 gives you a buffer. Beyond 8-10 years, a fixed mortgage almost always wins.
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