To Arm or Not to Arm? 7 Plain Questions To Ask Your Lender!

Real Estate Agent with Melody Russell Team at eXp Realty of California, Inc. 01468388

Sometimes, I find another blogger's post that says exactly what I would have, if I'd taken the time to write about the topic, so I repost their blog.    In this case, full credit goes to Lise Howe of Washington D.C. - thanks Lise!

Original content by Lise Howe DC AB15253

This year has not been kind to buyers.  First it was hard to win a house because there were so many multiple offer situations where you had to compete with lots of other equally motivated buyers.  Now the inventory levels are improving and there are more homes to choose from.  You can actually get a home inspection!  Just as you thought the market was turning in your favor, interest rates have shot up!  Last year you had to pay a premium for a home  - this year, you have to pay a premium in the mortgage market!   

If you’re shopping for a mortgage, you need to decide whether to choose one with a fixed or adjustable interest rate. Last year ajustable rate mortgages only accounted for 4% of mortgages in the US, but now they are as much as 10% of mortgages - a real reflection of the higher interest rates.

An adjustable-rate mortgage, or ARM, might be a good idea if you’re only planning to stay in your home for a defined number of years, but you need to ask questions and read the fine print first. You might be surprised by increased payments if you don’t understand the terms clearly.


Each lender sets its own terms and conditions for adjustable-rate mortgages, so you’ll have to check your loan agreement for specifics. But ARMs today commonly offer three types of rate caps that protect borrowers from unreasonable rate hikes. Most ARMs have:

1. A cap on how much your rate can increase at the end of the fixed-rate period. It can’t exceed the cap, no matter how high interest rates have risen.

2. Another cap on subsequent annual adjustments, meaning your rate can only increase by a certain amount each year.

3. A third cap on how high your rate can go over the entire life of your mortgage. This protects homeowners from seeing their rates rise astronomically if the market takes a dramatic upswing.


The main difference between a fixed- and an adjustable-rate loan is that the interest rate will never change for a fixed-rate mortgage. On the other hand, an ARM’s interest rate can change multiple times over the loan term. The monthly mortgage payment will change, too, if the index rises and falls.

For example, a 5/1 ARM means the mortgage has its initial fixed rate for the first five years and then the rate can adjust once per year for the remaining 25 years. Other common options include a 7/1 or 10/1 ARM, meaning your initial rate is fixed for 7 or 10 years before it can adjust.

So you could save a small fortune in monthly payments by opting for an ARM, at least over the first five to 10 years of your loan. Alternatively, you could afford a much nicer, more costly home with the same payments you’d make on a smaller, fixed-rate mortgage.

Of course, an ARM isn’t for everyone. If you plan to stay in your home longer than 10 years, an ARM might not be the best choice. But if an adjustable-rate loan works for your financial situation, you could have a much better shot at affording a home in today’s market.  In addition, you can always finance out of your ARM and into a fixed rate mortgage when rates return to a level that is more acceptable to you. 



Your ARM rate can never fall below a certain margin specified in your loan documentation. For example, if the margin specified is 3%, the margin is added to the current index number on the date your rate adjusts.


ARM loans have rate caps that limit the amount your interest rate can rise or drop in a single period and over the lifetime of your loan. Your loan might not increase or decrease exactly along with the market if it hits its cap.An initial cap is the maximum percentage your rate can increase or decrease in a single period after your fixed-rate period expires. A periodic cap limits the maximum amount that an interest rate can change from one adjustment period to the next.  A lifetime cap puts a limit on the total amount that your interest rate can increase or decrease from the introductory rate over the mortgage term. Your lender will express your ARM caps as a series of three numbers separated by forward slashes in this format: initial cap/periodic cap/lifetime cap. This is your “cap structure.”  So, an ARM with a 2/1/5 cap structure means that your loan can increase or fall 2% during your first adjustment and up to 1% with every periodic adjustment after that. Finally, your interest rate can’t increase or decrease more than 5%  above or below the initial rate over the entire lifetime of your home loan.


1. How is the rate determined? After the initial repayment period ARM rates are based on a benchmark market index plus a set rate known as the margin.  For example, when I had my adjustable rate mortgage, the rate was set according to the one year T Bill rate plus an additional amount, which is my case was 1.5%.  For example, if the 1 year T Bill rate was 3%, then my mortgage rate was 4.5%. 

2. How volatile is that index?  The 1 year T Bill rate was pretty stable, but not every index is slow moving.  Ask your lender to review the history of the index to which you are going to be tied. 

3. How long is your rate fixed before it starts to adjust?  In my case it was fixed for 7 years before it could begin adjusting.  A lot can happen to rates in 7 years.  In my case rates started going down and so did my mortgage rate when the time came to adjust.  I got down below 2% one year! 

4, What is the lifetime cap and the annual cap on your mortgage.  For example, in my case, the cap was 6% for the lifetime cap and 2% for the annual cap.  I got my mortgage in 2003 when fixed rates were very high and my initial rate was 8.5%.  The lifetime cap was 6% so that meant that the mortgage rate could go up to 14.5%.  Yes that was scary, but it could not happen for 10 years.  The rate was fixed at 8.5% for 7 years and then it could not go up higher than 10.5% in the 8th year, 12.5% in the 9th year and 14.5% in the 10th year.  I was willing to take a chance that the interest rates would get better before that and I could refinance before that.  

5. Is there a floor on how low your mortgage can go?  You should always be optimistic and interest rates will come down again! 

6. Is there any possibility of negative amortization. Many people have gotten into trouble with ARMs because of negative amortization. That happens when the amount of payments made is not enough to cover interest. The amount of unpaid interest is added to the loan, and then interest is charged on that. This means the total balance on the mortgage can actually increase, even if you make payments on time every month. RUN AWAY from an ARM if negative amortization is possible.

7. Is there a prepayment penalty?  You might have to pay thousands of dollars if you decide to sell your house or refinance your mortgage before the fixed period ends. 


The most attractive feature of an ARM is the low, fixed rate for the first several years. This could help you save a significant amount of money if you plan to sell your house before the rate adjusts. If you decide to stay in your house longer, your payments could become too much for you to handle. Before you choose an ARM, think carefully about your future plans and make sure you understand the terms.


In a shifting market like this one, it is more important than ever to work with a knowledgable team - not just the Realtor, but also the lender, title attorney and home inspector.  Be sure to talk to your agent about the rest of his or her team.  Interview several lenders and ask them about fixed rate mortgages versus ARMS.  How well can the lender explain the differences and help you understand which is best for you.  There are several ARMS to consider.  Is a 5 year rate better for you than a 10 year rate?  

If you live in the DC metro area and are thinking about buying a home this year, then please give us a call at the Lise Howe Group at 240-401-5577 or email us at  It is important to us that you find the right home for your financial situation and that you get the best mortgage rate for your future. 



You know there is more to the process than just picking a property and making an offer. You need to find the best location for your wants and needs, get a great price, and work with a lender who will make your life easier - not harder.  Trust your search with a Realtor who is licensed in DC, MD and VA and really knows the city and all its secret neighborhoods.

Start your search with the Lise Howe Group, Washington Natives who love the city and all its quirkiness! If you are moving or relocating to Washington DC, be sure to ask for our relocation guide. Call us at 240-401-5577 to schedule an appointment or email us at  Too excited to wait to talk to us about a great home? Just click here to start that home search.

If you want to see what is for sale in Washington DC, Chevy Chase and Bethesda, check out these links below:

Bethesda Condos and Coops for Sale

Chevy Chase Condos and Co-ops for Sale

Bethesda Single Family Homes over $1 Million 

Bethesda Single Family Homes Under $1 Million

Chevy Chase Single Family Homes Over $1 Million

Chevy Chase Single Family Homes Under $1 Million

Chevy Chase Condos and Coops Over $1 Million

Luxury Single Family Washington DC Homes

Washington DC Single Family Homes Under $1 Million

Washington DC Condos


Lise Howe

Keller Williams Capital Properties

4646 40th St NW 

Washington DC 20016

240-401-5577 (24 hour direct)
Licensed in DC, MD, and VA
Associate Broker, GRI, ABR, CRS
The Lise Howe Group
Howe Real Estate Should Be!





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Building A Bridge to Your Future

M.C. Dwyer, MBA, REALTOR    call/text (831) 419-9759

Century 21 Showcase REALTORS Cal BRE 01468388 copyright 2012-19


Comments (2)

Wanda Kubat-Nerdin - Wanda Can!
Red Rock Real Estate (435) 632-9374 - St. George, UT
St. George Utah Area Residential Sales Agent

Fantastic re-blog of Lise's, it's good to know there are options for buyers right now in the market, M.C.

Nov 10, 2022 11:52 AM
Roy Kelley
Retired - Gaithersburg, MD

Thank you very much for sharing this excellent reblog selection.

Have an outstanding Easter holiday.

Apr 08, 2023 09:52 AM