The Quick Read: It can fit, but only when your vested, delivered stock income is documented and the loan still works at the full payment. A lender does not count unvested RSUs. It also tests you on the payment you would owe once principal starts, not the lower interest-only payment. The structure helps cash flow between vests. It does not build equity on its own.
An interest-only jumbo loan is a mortgage above the county conforming limit where you pay only interest for a set period, then start paying principal. Tech compensation and that structure look like a natural pair. Pay arrives in lumps, so a lower required payment feels useful. But the underwriting is stricter than most people expect.
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.
This guide walks through what the loan is, how a lender underwrites RSU income on it, where the rules bend, and how to decide.
What Is an Interest-Only Jumbo Loan?
A jumbo loan starts one dollar above your county’s conforming limit. The Federal Housing Finance Agency sets that limit each year, as a law-firm summary of the FHFA announcement explains. It differs by county and by number of units. So “jumbo” is not one national number. Check your county on FHFA’s site before assuming you need one.
Interest-only adds a second layer. The Consumer Financial Protection Bureau describes it as a loan whose scheduled payments cover only interest for a set period. Your balance does not fall with each payment. When the period ends, you pay the balance in full, refinance if you can, or start higher payments that include principal.
Across the wholesale programs Lendmire places files with, jumbo comes in fixed, adjustable, and interest-only structures. Here is the envelope for the jumbo loan programs discussed here, subject to lender guidelines and full file review:
- The headline lane works from a 660 decision score.
- Leverage reaches 90% on that lane, and several lanes reach 89.99% combined LTV. The rest stop at 80%.
- Loans run to $5,000,000 on the largest lanes.
- The ratio ceiling is 50% on the fixed lanes, 45% on the adjustable lanes, and 43% on the interest-only lanes.
Notice that last line. The interest-only lanes carry the tightest ratio ceiling. A lower payment does not buy you looser underwriting.
Key Terms Defined
Jumbo loan: A mortgage larger than the conforming limit for your county.
Interest-only period: The stretch when your required payment covers interest and none of the balance.
RSU (restricted stock unit): A promise of company shares that you receive as they vest.
Vesting: The point when shares become yours, usually on a schedule tied to time or performance.
Non-QM loan: A mortgage that falls outside the federal “qualified mortgage” box, often because of a feature like interest-only payments.
Reserves: Cash and liquid assets left after closing, counted in months of your full payment.
Debt-to-income ratio: Your monthly debts divided by your monthly qualifying income.
How Is an Interest-Only Jumbo Underwritten, Step by Step?
The lender works through six checks, and RSU income sits in the middle of them. Each step either adds usable income or removes it, so the order matters.
1. Confirm the loan is jumbo. The lender compares your loan amount to the county limit. This is a product label, not a grade on your credit.
2. Choose the structure. You pick a fixed, adjustable, or interest-only lane. Lane choice sets your leverage and ratio ceiling.
3. Sort your RSUs. The lender asks whether each grant is time-based or performance-based, whether it has vested, and whether the company is publicly traded.
4. Document the income. More on this below.
5. Calculate qualifying income. Salary is added to a separately averaged stock figure.
6. Test the payment. The lender checks your ratios against the payment that applies after the interest-only period.
Add the appraisal and your assets, and you have the whole file. The appraisal values the collateral and sets the maximum loan-to-value. Some lanes require two appraisals above a threshold amount. Reserves rise with the loan amount.
How Do Lenders Count RSU Income?
Vested, delivered, and documented RSUs count. Unvested units do not. The Fannie Mae Selling Guide requires that restricted stock has vested and been distributed to you without restrictions. Jumbo loans are not sold to Fannie Mae, so each jumbo lender sets its own guidelines. Many use the agency approach as a reference point and then add overlays. Do not assume your lender applies it unchanged.
Under the agency approach, the file typically includes:
- A verification of employment showing stock distributions, or a recent paystub plus two years of W-2s.
- Proof the stock is publicly traded.
- Your current vesting schedule, showing past and future vesting.
- A brokerage or bank statement showing you received earlier distributions.
- A verbal check with your employer.
For income paid in shares, the agency method uses a 200-day moving average of the stock price. That smooths out a hot week or a bad one. A mortgage insurer’s training aid summarizing the agency rules describes the math: multiply that average price by the vested shares over the past 24 months, then divide by 24. It also describes about 12 months of history for time-based awards and a check that the income will likely continue for three years. Treat those as agency reference points. Confirm them against the Selling Guide, and expect your jumbo lender to set its own.
| RSU situation | How it is usually treated |
|---|---|
| Vested and delivered, public company | Counts, after averaging |
| Unvested | Does not count |
| Sign-on grant vesting over time | Excluded under the agency approach |
| Performance-based award | Longer history preferred, with offsetting factors |
| Private-company equity | Generally outside the agency method; lender-specific |
Where Do the Two Meet? The Payment Test
Here is the part most guides skip. You pay less each month during the interest-only period, but the lender does not qualify you on that lower number. Federal ability-to-repay rules, at the heart of the CFPB’s official interpretations of Regulation Z, treat the payment for an interest-only loan as the amortizing payment spread over the term left after the interest-only period ends. Their example: a 30-year loan with two years of interest-only payments is tested over the remaining 28 years.
Two things follow. First, an interest-only loan is non-QM, because a qualified mortgage cannot defer principal. Non-QM does not mean unregulated. The lender still has to make a good-faith finding that you can repay. Second, the interest-only feature does not let you stretch to a bigger house on the same income. The tightest ratio ceiling sits on these lanes, as noted above.
So what does the structure buy you? Cash-flow room. Not borrowing power.
What Does This Look Like for a Real Borrower?
Picture an engineer with a solid base salary and four years of steady RSU vesting at a public company. She buys with a down payment of 20% of the price. Her qualifying income is base salary plus the averaged stock figure. The lender tests her at the full amortizing payment and finds her ratio inside the interest-only lane’s ceiling. Exact terms depend on the lender’s guidelines, property type, leverage, and a full review of the borrower’s file.
Now the part that matters after closing. Her required payment is lower each month, which eases the squeeze between quarterly vests. Her balance does not move, though. If she wants equity growth, she sends extra principal after vests. The loan allows that choice. It does not make it for her.
Now picture her colleague. He joined last year, and most of his package is a sign-on grant that vests over time. Under the agency approach that grant is excluded, and he has little delivered history. The same loan may not work for him yet, or it may work at a smaller amount. Waiting a few vest cycles can change the picture.
Where Does the General Rule Break?
Several edge cases come up again and again:
- Sign-on RSUs. Excluded as income under the agency approach when they vest over time.
- Recent IPOs. A stock without enough trading history for a 200-day average may not qualify, and short RSU history can be the controlling factor.
- Short history. Performance-based awards may qualify with 12 to 24 months of history when offsetting factors exist, per the training aid above.
- Private-company equity. The agency method asks for proof of public trading, so private-company grants often need a different lender’s view.
- Second homes and rentals. Occupancy decides the leverage on these lanes, so a second home or investment property carries its own lane-specific limits. Ask your loan officer.
- Refresher grants versus initial grants. A lender may weigh them differently, because a refresher shows the company keeps granting.
What Are the Risks After Closing?
The biggest risk is a stock drop paired with a payment reset. Qualifying income uses averaged, vested figures, but your actual vests depend on the share price on the day. A falling stock or a layoff cuts the cash you were counting on. The loan keeps its schedule regardless.
Borrowers should not assume they can sell or refinance when the payment rises. Read that as a planning rule. Before the interest-only period ends, ask yourself whether you could carry the full payment on salary alone. If the answer relies on stock you do not yet own, the reset is a real exposure.
Concentration matters too. Your paycheck, your vests, and your savings may all ride on one company. A lower payment leaves cash free, but investing that cash back into the same employer’s stock stacks the risk.
Also remember the balance does not shrink. A lower payment is not a cheaper loan. You owe the same amount until you pay principal.
Who Should Skip This Structure?
Skip it, or think hard, if any of these describe you:
- Your RSU history is thin or mostly sign-on grants.
- Your household depends on a single income.
- Most of your net worth sits in one company’s stock.
- You would need the lower payment just to afford the house.
- You plan to hold the home long past the interest-only period with no clear way to cover the reset.
It fits better when you have several vest cycles behind you, a salary that could carry the full payment, and a plan to pay down principal with vest proceeds.
What Are the Alternatives?
| Option | What it offers | Tradeoff |
|---|---|---|
| Fixed amortizing jumbo | Steady payment, principal falls | Higher required payment |
| Adjustable jumbo | Payment can change over time | Rate-change risk |
| Interest-only jumbo | Lower required payment early | Balance flat, reset ahead |
| Sell shares for a larger down payment | Smaller loan | Gives up stock and may trigger tax |
On the last row, tax treatment can depend on your situation; borrowers should speak with a qualified tax professional before relying on any deduction or credit. The IRS publishes the general guidance on compensation paid in property.
Honestly, this is a close call for many tech buyers. A fixed jumbo with voluntary extra principal after vests gives you much of the same flexibility, and no reset.
What Should You Ask a Loan Officer?
- Does this lender use the agency RSU method, or its own overlays?
- How many months of vested history does it want?
- Does it count performance awards, refreshers, or sign-on grants?
- Which documents prove delivery of shares?
- Which lane does my file fit, and what is its ratio ceiling?
- What are the reserve and appraisal requirements at my loan amount?
Expect a heavier document package than a salary-only loan. Brokerage statements, the vesting schedule, and a verbal check with your employer are normal.
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.
Frequently Asked Questions
Do unvested RSUs count as income?
No. Underwriters treat unvested units as unavailable. Under the agency approach, stock must have vested and been delivered to you without restrictions. Only the vested portion, averaged over your history, feeds your qualifying income.
Do I need to sell my shares to use RSU income?
Not to count the income. Lenders document the income from vesting records and brokerage statements. You may still need cash for your down payment and reserves. Those funds come from verified assets, and your lender will tell you which asset types it accepts.
What happens when the interest-only period ends?
Your payment rises, because principal is now repaid over a shorter remaining term. The CFPB lists these paths: pay the balance in full, refinance if available, or begin the higher payments that include principal. Plan as if the step-up is certain.
Can I qualify with a short vesting history?
Sometimes. Performance-based awards may qualify with 12 to 24 months of history when offsetting factors exist. Time-based awards usually need about a year of history from the current employer under the agency reference. Jumbo lenders set their own minimums, subject to lender guidelines.
Does a private-company grant count?
Often not under the agency method, which asks for proof the stock is publicly traded. A jumbo lender may view private equity differently. Ask early, because this answer decides which lender you start with.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage brokerage serving homeowners and home buyers in 16 states. FHA, VA, conventional and jumbo purchase and refinance loans are arranged through wholesale lending channels; Lendmire brokers the financing and the lender underwrites each application. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Orrick, FHFA conforming loan limits summary
2. CFPB, What is an interest-only loan?
3. Fannie Mae Selling Guide, B3-3.3-07: Restricted Stock Units and Restricted Stock Employment Income
5. Regulation Z, Supplement I (official interpretations), via Cornell LII
This article is part of Lendmire’s jumbo loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Does an Interest-Only Jumbo Loan Work for a Home Purchase? · How Much Lower an Interest-Only Jumbo Payment Is During the IO Period · Can You Close a Jumbo Loan in a Living Trust?
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.