ARM vs Fixed-Rate Mortgage: Which Is Better in DC, MD & VA? (2026)

The 30-year fixed mortgage is the default choice for most DC metro homebuyers, and for good reason — the payment never changes. But with rates hovering near 7% as of September 2026, the monthly cost of a fixed loan is stretching budgets thinner than they have been in years. That is pushing more buyers to ask a question that was barely on the radar a few years ago: should I consider an adjustable-rate mortgage (ARM)? The answer depends on how long you plan to stay, how much risk you can tolerate, and whether the savings during the fixed period are enough to justify the uncertainty after it. Here is a straight comparison for buyers in DC, Maryland, and Virginia.

What a Fixed-Rate Mortgage Is

A fixed-rate mortgage locks in your interest rate for the entire life of the loan. If you get a 30-year fixed at 6.95%, you pay 6.95% every month until the loan is paid off or you refinance. Your principal and interest payment stays identical from month one through month 360. Property taxes and insurance can change, but the core loan payment does not.

The advantage is certainty. You know exactly what your housing payment will be for decades, which makes budgeting simple and protects you if rates go higher. The disadvantage is that you pay a premium for that certainty — fixed rates are typically higher than the introductory rates on comparable ARMs.

What an Adjustable-Rate Mortgage (ARM) Is

An ARM has an interest rate that changes over time. The most common structure is a "hybrid ARM" — a fixed period followed by an adjustable period. A 7/1 ARM, for example, has a fixed rate for the first 7 years, then adjusts annually for the remaining 23 years. A 5/1 ARM fixes for 5 years, a 10/1 ARM for 10 years.

During the initial fixed period, the rate is usually lower than a 30-year fixed — often 0.5 to 1.0 percentage points lower. After the fixed period ends, the rate adjusts based on an index (typically SOFR or the Treasury yield) plus a margin set by the lender. Adjustments are capped: there is usually a periodic cap (how much the rate can change at each adjustment), a lifetime cap (the maximum rate over the life of the loan), and sometimes a first-adjustment cap.

Side-by-Side Comparison

When an ARM Makes Sense in the DMV

The DC metro market has a few characteristics that make ARMs more practical than they might seem in other parts of the country:

• High turnover — the average DC metro homeowner stays in their home for about 8–10 years, shorter than the national average. Federal employees, military, and contractors relocate frequently.
• High home prices — lower initial payments can make the difference between qualifying and not qualifying, or between affording a home in a preferred neighborhood versus settling for less.
• Refinance opportunities — if rates decline during your fixed period, you can refinance to a fixed rate before the adjustment period begins, locking in the lower rate permanently.
• Starter home strategy — if you are buying a starter home you plan to outgrow in 5–7 years, the adjustable period may never arrive.

When a Fixed Rate Is the Better Call

Despite the savings, a fixed-rate mortgage is still the right choice for most buyers. Here is when we strongly recommend sticking with fixed:

• You plan to stay in the home long-term (10+ years) — the adjustment period becomes a real risk
• You are at or near your maximum budget — if the payment rises after the fixed period, you may not be able to absorb the increase
• You are risk-averse and value predictability over potential savings
• You believe rates will stay high or rise further — in that case, locking in a fixed rate now is the safer bet
• You are using an FHA or VA loan — these programs offer fixed-rate options and are less commonly paired with ARMs

Understanding ARM Caps

If you are considering an ARM, the caps are what protect you from worst-case scenarios. There are three you need to understand:

1. 1Initial adjustment cap — the maximum the rate can change at the first adjustment after the fixed period ends (commonly 2% or 5%)
2. 2Periodic adjustment cap — the maximum the rate can change at each subsequent annual adjustment (typically 2%)
3. 3Lifetime cap — the maximum rate over the entire life of the loan, usually 5% above the initial rate (so a 6.25% start rate would cap at 11.25%)

We always model the worst-case scenario for ARM clients: what does the payment look like if the rate rises to the lifetime cap at the first adjustment and stays there? If that scenario is affordable — even if uncomfortable — the ARM is a defensible choice. If it would put you at risk of default, the fixed rate is the answer.

The Bottom Line

There is no universally right answer. If you are buying a home in DC, Maryland, or Virginia and you are confident you will move or refinance within 7 years, a 7/1 ARM can save you $15,000+ over that period. If you are putting down roots for the next decade or more, the fixed rate gives you peace of mind that no market swing can disrupt. We run both scenarios for every client — the math, the worst case, and the break-even — so you can decide with your eyes open. Reach out and we will model both options for your specific purchase price and timeline.