Compare Mortgage Rates on a Jumbo 5-Year ARM
If you’re thinking about buying a house with a jumbo 5-year adjustable-rate mortgage (ARM), you probably have some appetite for risk. As the “jumbo” suggests, you’re borrowing a relatively large sum of money. And the adjustable interest rate means your monthly mortgage payment can fluctuate, making this kind of loan somewhat unpredictable.
Still, the gamble can pay off. 5-year ARMs come with some of the lowest interest rates of any mortgage product. If you have a plan to sell or refinance before the introductory period is up, you know you’ll make more money in the future, or you think interest rates will come down, it could be right for you.
Before you lock in with a jumbo 5-year ARM, though, you should compare mortgage rates and understand what they’ll do to your ability to afford the loan. That gets easier when you understand how this kind of mortgage works, so let’s start there.
What is a jumbo 5-year ARM?
It helps to look at the two main features of this loan — its jumbo size and the ARM portion — separately.
A jumbo mortgage is any home loan that exceeds the current loan limit set by the Federal Housing Finance Administration (FHFA). In 2025, that’s $806,500 for most of the country.
If you want to borrow more than the FHFA limit for your area, you’ll need a jumbo loan.
But with a jumbo 5-year ARM, you’re not just choosing any jumbo mortgage. You’re taking on one of the riskiest options out there in order to get a lower interest rate.
With any adjustable-rate mortgage, the lender can periodically change the interest rate. With the 5-year ARM, you get an introductory period of five years with a fixed interest rate, after which your rate starts adjusting. Lenders like the flexibility ARMs give them. As a result, you should be able to get a lower interest rate for that introductory period than you’d see with a fixed-rate loan.
Once your lender starts adjusting your rate, they might reset your rate annually (with a 5/1 ARM) or every six months (with a 5/6 ARM). The amount your rate adjusts depends on the performance of the market index to which your loan is tied. Generally, these indexes tend to go up, which means your interest rate — and your monthly payment — could, too.
The pros and cons of a jumbo 5-year ARM
Because this is a fairly risky kind of mortgage, it’s important to consider the advantages and drawbacks.
Pros of a jumbo 5-year ARM
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If you know you’ll sell or refinance before the five-year introductory period is up, this kind of mortgage gives you a way to get a lower interest rate on your jumbo loan.
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Because interest rates start lower with an ARM — and particularly with a short introductory period like the 5-year option — it can lower your monthly payment. That might help you qualify for your jumbo loan amount by lowering your debt-to-income (DTI) ratio.
Cons of a jumbo 5-year ARM
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A 5-year ARM doesn’t give you very long before your rate starts adjusting. With the large balance that comes with a jumbo mortgage, any upward adjustment in your rate could make your monthly payments hard to manage.
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Qualifying for a jumbo loan is harder than qualifying for a loan under the FHFA’s local limit. You’ll usually need to put a bigger down payment (e.g., 10–20%), too.
How to compare Jumbo 5-Year ARM mortgage rates
If you only take one piece of advice when you’re getting a mortgage, let it be this: compare rates from at least three different lenders. Doing so can save you thousands of dollars over the life of your loan.
To make it easier for you to put the work in here, follow these steps:
Step 1: Understand your borrower profile
First, you want to get a handle on how mortgage lenders are going to see you. If you look like you’re going to be able to repay your home loan fairly easily, they’ll offer you more favorable conditions. If you look high-risk, you’re going to pay more for your mortgage. Specifically, you’ll be charged a higher interest rate.
So, what makes a borrower low- or high-risk? To decide what kind of loan to offer to you (if any), lenders look at a lot of factors. The biggest ones here include:
- Your monthly income — you don’t want an overly large chunk to have to go toward paying your monthly mortgage bill, which lenders measure with your debt-to-income (DTI) ratio
- Your credit score, which essentially tells them how good you’ve been with managing money in the past
- Your loan-to-value (LTV) ratio (higher is riskier) — the price of the house and your down payment size both come into play here
If you’re not in good shape in any of these areas, putting in some work before you buy (e.g., working on your credit score, lowering your DTI ratio) can help you get a lower interest rate.
Step 2: Use rate tables to see what’s on offer today
There are lots of resources online that show you rate offers from leading lenders. Use a mortgage rate table to get a feel for what kind of interest rates are available from financial institutions that provide home loans in your area.
Ideally, that rate table lets you input personal information, like your credit score and the price of the house you want to buy. This way, the rates you get shown should align with what you’re actually eligible to get. A lot of lenders advertise low starting rates, but only the “best” borrowers will be approved for them once they apply.
Step 3: Get preapproved with three lenders
Once you’ve picked out a few lenders that look good to you, go through their preapproval process. That will mean filling out some paperwork, but it’s the best way to figure out what you can really qualify for in terms of loan size and interest rate.
Have financial documents — like your bank statement and pay stubs — handy to make it easier to complete your preapproval applications.
Step 4: Compare preapprovals
When you get preapproved, the lender should give you documentation about your potential mortgage. Ideally, this gives you a feel for the total amount you’re borrowing, the repayment term, the interest rate, fees, and closing costs.
Line up your quotes from each lender and go through them, paying special attention to the annual percentage rate (APR). This tells you how much you’ll pay each year for the loan including not just interest, but also fees. By looking at APRs, you get a clear idea of what you’ll truly pay if you choose that specific mortgage. This helps you identify the best option for yourself and your financial goals.
If you’re ready to start comparing Jumbo 5-Year ARM rates, use our rate table to get started. We have fields up top where you can input key details like your credit score range and zip code so we can best tailor the mortgage rate offers to you.