The Quick Read: A fixed jumbo loan fits RSU-heavy households that want one payment they never have to re-test against a stock price. An adjustable-rate mortgage (ARM) fits a shorter hold, solid cash reserves, and a plan that still works if you can’t refinance. Your RSUs affect which loan you qualify for, and the structure you pick decides how exposed you are afterward. Both are subject to lender guidelines and full file review.
Here is the honest version. Fixed is the default for a reason: your pay already moves with a stock price, so a payment that moves too stacks one variable on another. An ARM is a legitimate tool, not a trap. It works when you know you’ll sell or refinance inside the fixed window and you could survive the worst-case reset. Neither choice is wrong in general. One is wrong for your specific income, your timeline, and your cushion.
Jumbo payment estimate
The starting figures are an example price in the jumbo range with ten percent down on a thirty-year fixed. Replace them with yours.
Editable benchmark: 7.40% as of October 15, 2026 · Freddie Mac 30-year average via FRED®. A conventional market reference, not a jumbo loan quote.
Illustrative starting assumptions: a $1,000,000 price in the jumbo range, ten percent down on the top-leverage lane, a thirty-year fixed structure at the current Freddie Mac conforming benchmark, and property taxes and insurance estimated at typical national rates. Every field is editable.
Illustrative estimate only — not a Loan Estimate, approval, quote, or commitment to lend. The rate field carries the weekly Freddie Mac thirty-year conforming benchmark, a market reference and not a jumbo loan quote; jumbo rates are set by the lender and the lane at lock and differ from the conforming benchmark. An adjustable-rate scenario is shown at the benchmark for the whole term; the rate after the initial period is unknown. Reserve months and appraisal counts follow the lane sheet for the amount band; the automated finding may require more. Taxes, insurance and dues are editable estimates; closing costs are not included. On most lanes the conforming limit for the county decides whether a loan is jumbo at all; two lanes start at a stated dollar floor instead. Licensed in sixteen states for consumer mortgages.
A quick note on terms. A jumbo loan is any mortgage above the county’s conforming limit, the cap set each year by the FHFA. Limits vary by county, so the same loan can be jumbo in one place and conforming in another. Lendmire arranges these through its jumbo loan programs, as a broker working with wholesale lenders in 16 states.
Side-by-Side
| Factor | Jumbo Fixed | Jumbo ARM |
|---|---|---|
| Payment behavior | Principal and interest never change | Fixed for an initial period, then adjusts |
| Max ratio (DTI) | Up to 50% on fixed lanes | 45% on adjustable lanes |
| Leverage | Up to 90% on the headline lane | Lane-specific, often lower |
| Credit floor | 660 decision score, headline lane | Set by the lane |
| Mortgage insurance | Depends on leverage and lane | Depends on leverage and lane |
| Occupancy | Primary, second home, investment by lane | Same, lane-specific leverage |
| Documentation | Full income, assets, vesting records | Same, plus ARM disclosures |
| Exposure to your stock price | Qualifying only | Qualifying and every future reset |
Treat the figures as the outer edge of the envelope. Leverage to 90% applies only on the headline lane, and several lanes reach 89.99% combined loan-to-value while the rest stop at 80%. Loans run to $5,000,000 on the largest lanes. Reserves, measured in months of the full payment, rise with the loan amount. Many lanes require two appraisals above a set loan size. Everything depends on your file.
How Lenders Treat RSUs on Either Loan
RSUs count only after they vest. An unvested grant is a promise, not income. Jumbo loans aren’t bought by Fannie Mae or Freddie Mac, so each lender sets its own RSU rules. Still, the Fannie Mae Selling Guide is the best public benchmark, and many lenders borrow its logic.
Under that benchmark, stock must be vested and distributed to you without restrictions. Sign-on grants that vest over time don’t count. The lender wants the vesting schedule, proof the stock is publicly traded, statements showing past distributions, and your pay records. For share-based income, the guide uses a 200-day moving average price rather than today’s quote. That means a big one-week stock spike won’t inflate your qualifying income.
Expect a vesting history, too. Most lenders want a track record with your current employer before they’ll lean on RSUs. A recent job change often means the lender underwrites you on base pay and bonus alone. That’s the usual reason a household with huge total compensation qualifies for less than expected.
Here is the part most explainers skip. Fixed versus ARM doesn’t change how your RSUs are counted. It changes the payment the lender tests you against. For an ARM, the lender generally can’t qualify you on the teaser payment. The test uses a higher, fully adjusted payment. So an ARM doesn’t reliably buy you a bigger loan. Don’t pick it for that reason.
When Fixed Is the Better Fit
Fixed wins when stock-linked pay is a large share of your income. If RSUs are a big slice of what you earn, you already carry one moving part. A fixed loan keeps the other part still.
Consider these situations:
- You plan to stay put. Longer holds favor fixed. Resetting payments over a long stretch is a long exposure.
- Your reserves are thin. An ARM’s worst case is a payment jump. If a jump plus a flat stock price would strain you, take the certainty.
- Your job isn’t locked in. Tech layoffs, a stock decline, and a payment reset can all land in the same year. Fixed removes one of the three.
- Your qualifying income leans on RSUs near the lender’s minimum history. Thin documentation makes a refinance harder later, and an ARM often depends on a refinance.
- You want budgeting you can ignore. Vests arrive in lumps, and taxes are withheld before you see the shares. A steady payment is easier to plan around those lumps.
Picture a buyer with a base salary that covers the loan comfortably and RSUs that cover everything else. Fixed lets that buyer treat the RSUs as savings, not as a payment source. That’s a calm way to own a jumbo balance.
The cost is flexibility. A fixed loan may start with a higher payment than an ARM would, and the only way out of an unwanted structure is selling or refinancing. If you move in a few years, you may have paid for stability you didn’t use.
When an ARM Is the Better Fit
An ARM wins when you have a defined exit and a cushion. The structure is simple. You get a payment that stays fixed for an initial stretch, then adjusts. In a “7/1” or “7/6” ARM, the first number is the fixed years and the second is how often it adjusts afterward. After the fixed stretch, the rate is an index plus a margin, within caps.
An ARM can make sense in these situations:
- You expect to sell or relocate inside the fixed period. You may never see a reset.
- Your base pay covers the fully adjusted payment. That’s the real test. If base salary alone survives the worst-case reset, RSUs become a bonus rather than a lifeline.
- You hold large reserves or vested shares. A deep cushion lets you absorb a bad stretch without a forced sale.
- You can pay down principal aggressively. Some borrowers use vested shares to cut the balance before any reset.
Think of an RSU-heavy borrower who plans to relocate for a role in a few years and has several months of reserves beyond what the lender requires. For that person, an ARM’s lower early payment is a reasonable bet, not a gamble. The key test is whether you’d still be fine if the exit doesn’t happen.
The risks are specific. A consumer-protection handbook from the CFPB warns that an ARM’s payment may start low but can rise, and that you should consider one only if you can afford increases up to the maximum. An older CFPB handbook adds that payments can rise even if rates don’t move. Read the caps before you sign. The caps tell you the real worst case.
The Correlated-Risk Test
Stress-test the ARM against three bad things happening together. Stock drops, a layoff arrives, and the payment adjusts. That combination is the real hazard for RSU-paid buyers. Each alone is manageable. Together they’re how a good plan turns into a forced sale.
Run this check before choosing an ARM:
1. Price the maximum payment the caps allow, not the starting one.
2. Cover it from base pay alone, with RSUs set to zero.
3. Count how many months of that payment your cash and non-stock assets can carry.
4. Ask what happens if a refinance isn’t available because your income documentation weakened or the stock fell.
If you pass all four, an ARM is defensible. If step two fails, fixed is the safer lane.
One more point on refinancing. “I’ll refinance before it resets” is a plan, not a guarantee. It depends on your income at that moment, your employment, your home value, and market conditions you don’t control. Tell yourself the plan B before you need it.
Vest Calendar and Monthly Cash Flow
Your payment is due monthly. Your RSUs vest in lumps, often quarterly. Build a buffer that carries the loan between vests so you’re never selling shares at a bad moment just to cover a payment. Many borrowers keep vested stock as a reserve and sell on a schedule, not on impulse. Withholding on vest day often leaves you with fewer shares than the grant implies, so plan around what you actually keep.
Tax treatment can depend on your situation; borrowers should speak with a qualified tax professional before relying on any deduction or credit.
A point on using vested shares after closing. Some buyers apply them to principal, some to reserves, and some hold them. Each choice changes how well you tolerate an adjustable payment. A larger down payment also lowers leverage, which can matter for mortgage insurance and for how a lender views the file.
If You Change Jobs Mid-Loan
A job change doesn’t alter an existing fixed payment. It can change your options. On a fixed loan, the payment stays the same no matter where you work. On an ARM planned around a refinance, a new employer can reset your documentation clock and weaken the exit. Sign-on grants usually don’t count as qualifying income, and a short vesting record can leave a lender relying on base pay. That’s another reason fixed suits a volatile career.
Lenders also treat occupancy differently. Primary residences, second homes, and investment properties each carry lane-specific leverage, so a plan to rent the home out later changes the math. Tell your loan officer the plan up front.
Common Mistakes
- Counting unvested RSUs as comfort. They aren’t income to a lender, and they aren’t guaranteed to you either.
- Choosing an ARM to qualify for more. The qualifying payment generally isn’t the teaser payment.
- Assuming a refinance will be there. It’s an exit that depends on conditions you can’t control.
- Ignoring the caps. The cap schedule defines your worst case.
- Assuming “jumbo” means risky. It’s a size label. The CFPB does set a different price threshold for higher-priced jumbo first liens, which affects escrow and appraisal rules, not whether the loan fits you.
- Forgetting that county limits change. Whether your loan is jumbo depends on your county, and the limits update each year, so check the current figure.
Key Terms Defined
ARM (adjustable-rate mortgage): A loan whose rate stays fixed for an initial period, then adjusts on a schedule.
RSU (restricted stock unit): A grant of company shares that you receive only as they vest.
Vesting: The point when shares become yours and count as income.
Reserves: Cash or liquid assets, measured in months of the full payment, that you keep after closing.
Decision score: The credit score a lender uses to place your file on a program lane.
Cap: The limit on how much an ARM’s rate or payment can change.
Balanced Verdict
Choose fixed if RSUs make up much of your pay, you plan to stay, or your reserves are modest. Consider an ARM if your base salary clears the worst-case payment, you have a firm exit, and your cushion is deep. A mixed picture is common: the same borrower might pick different structures at different life stages. What matters is that the choice survives your bad year, not your best one.
If you are buying a home and want to see whether a jumbo loan fits your file, Lendmire can help you compare the options and what each one asks of the file. For a related look at timing, see Lendmire’s piece Fixed vs ARM for a Homeowner With RSUs: Jumbo Cash-Out Timing.
Frequently Asked Questions
Can I get a jumbo ARM using RSU income?
Often yes, if the shares have vested and your history meets the lender’s minimum. Each jumbo lender sets its own RSU rules, so the details vary. Expect to document vesting, distributions, and public trading of the stock. Approval is subject to lender guidelines and full file review.
Is an ARM too risky if most of my pay is stock?
It can be. Your income and your payment would both move. It becomes more reasonable if base pay alone covers the maximum payment and you have a firm exit plan. If either piece is missing, fixed is usually the calmer option.
Do unvested RSUs help me qualify?
No. Under the Fannie Mae benchmark, only vested and distributed stock counts, and sign-on grants that vest over time are excluded. Jumbo lenders set their own rules, but unvested units are rarely treated as income.
Does an ARM let me borrow more than a fixed loan?
Not reliably. For an ARM, lenders generally review your file on a higher payment than the starting one. The lower early payment helps cash flow, but it doesn’t automatically raise the amount you can borrow.
What if I leave my employer after closing?
A fixed payment doesn’t change. An ARM that depends on a future refinance gets riskier, because new employment can weaken your income documentation. Plan for that before you choose.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
As a mortgage broker (NMLS# 2371349), Lendmire helps homeowners and home buyers in 16 states with FHA, VA, conventional and jumbo purchase and refinance loans arranged through wholesale lenders. Lendmire is never the lender; program terms are set by the lender and the agency guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. FHFA – 2026 Conforming Loan Limit Values
2. Fannie Mae Selling Guide B3-3.3-07: Restricted Stock Units and Restricted Stock
3. CFPB – Consumer Handbook on Adjustable-Rate Mortgages
4. CFPB – What is a higher-priced mortgage loan?
This article is part of Lendmire’s jumbo loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Is a 7/6 ARM a Sensible Jumbo Cash-Out Structure for Fast Payoff? · How Much Equity a Paid-Off Home Yields in a Jumbo Cash-Out · How to Get a Jumbo Cash-Out on a Paid-Off Texas Homestead
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Disclosures. The information presented in this article is general market commentary, not financial, legal, or tax advice. Lendmire is a mortgage brokerage (NMLS# 2371349) — not a direct lender or depository institution — and loan placement is subject to lender underwriting. Nothing in this content represents a commitment to lend. Loan terms, pricing, and program availability vary based on borrower qualifications, property characteristics, and state of subject property, and are subject to change at any time. Lendmire complies with Equal Housing Opportunity requirements. Consumer access: nmlsconsumeraccess.org.