A lot of Scottsdale and north Phoenix homeowners still think of their mortgage as a jumbo loan because it was one on closing day. Balances shrink and limits rise. Put those two together for three or four years and a loan that needed jumbo underwriting in 2023 can quietly fit inside the conforming box today. Nobody from your servicer is going to call you about it.

How a jumbo loan becomes conforming

Your loan becomes conforming the moment its balance falls to or below your county limit, and the limit has gone up every year since 2021.

The Federal Housing Finance Agency resets the limit each year based on home prices. Maricopa County uses the national baseline, which for 2026 is $832,750 on a single family home. The table below shows the limit each year and what happens to a typical jumbo loan taken that year once you run the amortization forward to this month.

Balances assume a 30 year fixed with regular payments only. Extra principal payments move you under the line faster. The Consumer Financial Protection Bureau explains how to look up the limit for any county if you own outside Maricopa.

To check where you stand, pull your latest mortgage statement and look at the principal balance, not the payoff figure, which includes interest. Then add whatever closing costs you would roll into the new loan. That total is the number that has to land at or below $832,750. If it is close, your lender can run it both ways before you commit to anything.

One honest point before anything else. If you are in the 2021 or 2022 rows with a rate starting with a 3 or a 5, being conforming does not make a refinance smart. At today's rates it would raise your payment. This post is for the people in the 2023 row and anyone with a jumbo ARM about to reset.

The math on a 2023 jumbo loan

On an $840,000 jumbo taken in late 2023 at 7.75%, refinancing the current balance into a conforming 30 year fixed at 7.125% cuts the payment by about $515 a month.

That borrower has paid the loan down to roughly $816,800, which is under the $832,750 limit with room to spare. Principal and interest today are about $6,018. The same balance at 7.125% on a new 30 year term runs about $5,503. With roughly $9,000 in closing costs, break even lands near 18 months. Our guide to calculating your refinance break even point walks through the method.

Here is the part most people miss. The same refinance done as a jumbo at 7.15% would save almost exactly the same amount.

In the Mortgage Bankers Association weekly survey released September 23, the average 30 year conforming rate was 7.12% and the average jumbo was 7.15%. The savings in this example come from rates falling from 7.75%, not from the loan changing categories. So why bother with conforming at all? Because qualifying is a different conversation.

Run your own numbers

What conforming actually gets you

Conforming underwriting is more forgiving on reserves, debt to income, and appraisals, and that matters most when your file is anything other than simple.

• Reserves. Many jumbo programs want six to twelve months of payments sitting in the bank after closing. Conforming files often need far less, sometimes none.
• Debt to income. Automated conforming approvals can reach 50% DTI. Plenty of jumbo lenders cap well below that.
• Appraisal. A conforming refinance can qualify for an appraisal waiver. Jumbo almost never does, and some lenders order two appraisals on higher value Paradise Valley and north Scottsdale homes.
• Lender choice. Every wholesale lender prices conforming loans. Jumbo appetite shrinks when markets get nervous, and this month they are nervous.

Here is how that plays out in a real file. A business owner with a 2023 jumbo, strong income, and most of his cash tied up in the company applies to refinance with his original jumbo lender. The lender wants nine months of reserves he does not want to pull out of the business. Priced as conforming, the same borrower needs a fraction of that, clears automated underwriting, and gets an appraisal waiver on top. Same house, same income, same rate range. Completely different closing.

The CFPB's jumbo loan explainer covers why jumbo loans carry stricter terms. If you want the broader jumbo refinance picture, including cash out rules above the limit, see our Scottsdale jumbo refinance guide.

If you are just over the line

If your balance is within a few thousand dollars of $832,750, you can bring cash to closing to get under it, but only do that when conforming terms clearly beat the jumbo quote.

The 2025 row above is $2,500 over. Paying that down at closing is an easy call if it gets you an appraisal waiver or saves a reserve requirement you could not meet. Paying $25,000 down to chase a three hundredths of a point rate difference is not. We laid out when that trade works in our post on the cash in refinance in Arizona. Remember that closing costs you roll into the new loan count toward the limit too, so a borrower sitting at $828,000 may need to pay costs in cash to stay conforming.

When to pull the trigger

Refinance from jumbo to conforming when your rate is at least three quarters of a point above today's market, when your jumbo ARM is about to adjust, or when your jumbo lender's terms are keeping you from qualifying.

Pull your ARM note before you decide anything. It lists the index, the margin, and the caps on how far the rate can move at the first adjustment and each one after. Add the current index to the margin and you have a rough idea of your new rate. If that lands near or above today's fixed rates, a fixed refinance buys you certainty. If it lands well below, the ARM may be the cheaper place to sit for another year.

With rates back above 7%, the first reason is rarer than it was in August. The second is common. A lot of 2019 to 2021 jumbo ARMs in the Valley are hitting their first adjustment this year, and for balances that have shrunk under the limit, a conforming fixed rate is often the cleanest exit. You can see how we run a refinance start to finish on our process page, compare products on our loan programs page, or read who you would actually be working with before you call. The whole team at Pillar Mortgage Group works from Scottsdale, and if a refinance turns into a move up instead, the latest listings are on Arizona Luxury Property Search.

Honest caveat: this is the wrong move for anyone holding a jumbo rate below about 6.5%, and for anyone planning to sell within two years. The label change alone saves nothing this week. If your jumbo rate is fine and your lender is not causing problems, keep the loan, make an extra principal payment now and then, and revisit it when rates give you a real reason.

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