The Quick Read: An amortizing jumbo loan fits most RSU earners, and an interest-only structure fits a narrower group. The amortizing loan pays down principal from the first payment, which suits income that moves with vesting and stock price. Interest-only suits a borrower with strong reserves, a clear plan for the cash it frees up, and income that does not depend on one stock. Neither structure raises how much house a lender will let you buy. Both are subject to lender guidelines and full file review.
Who Each Option Is Really For
The amortizing loan is the default for a tech employee whose pay is part salary, part RSUs. The balance falls on a schedule you do not have to manage. The monthly obligation stays predictable even when the stock does not.
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.
The interest-only loan is a cash-flow tool. For an initial period, the required payment covers interest only, and the scheduled balance stays flat. Then the loan converts and the payment steps up, because the same balance now repays over fewer remaining years. It works for a borrower who will actually use the saved cash well and who can carry the higher payment after the reset without leaning on stock gains.
Here is the catch for RSU earners. The same volatility that makes the lower payment tempting is what makes the reset risky. A payment that rises just as a vest cycle shrinks is a bad pairing.
Side-by-Side
| Factor | Amortizing Jumbo | Interest-Only Jumbo |
|---|---|---|
| Principal during early years | Falls from the first payment | Scheduled balance stays flat |
| Leverage | Up to 90% on the headline lane | Lane-specific, often lower |
| Credit floor | 660 decision score on the headline lane | Set by the interest-only lane |
| Ratio ceiling | 50% on the fixed lanes | 43% on the interest-only lanes |
| Mortgage insurance | Mostly not used at jumbo leverage tiers | Same structure applies |
| Occupancy | Primary, second home, investment by lane | Lane-specific; this piece covers primary |
| Documentation | Income, assets, reserves, appraisal | Same, with closer review of the post-reset payment |
| Loan size | To $5,000,000 on the largest lanes | Lane-specific limits |
Every figure above comes from the wholesale lanes Lendmire places files with. They are guideline ranges, not promises, and each lender adds its own overlays. Reserves are counted in months of the full payment and rise with the loan amount. Above a lane’s threshold amount, expect two appraisals.
What Counts as Income When You’re Paid in RSUs
This is where RSU borrowers get surprised, so it comes before the structure choice.
Fannie Mae’s Selling Guide is a useful benchmark. Under it, restricted stock counts only after it has vested and been distributed to the borrower without restrictions. Sign-on bonuses paid as restricted stock that vest over time are not eligible. Unvested grants generally do not count, so a recent hire may qualify on salary and bonus alone.
The documentation is specific. The lender wants a verification of employment showing stock distributions, or a recent paystub plus two years of W-2s. It also wants proof the stock is publicly traded, the vesting schedule, brokerage statements showing prior distributions, and a verbal verification of employment. Fannie Mae values shares using a 200-day moving average price, not the price on the day you apply.
Two cautions. Fannie Mae’s rules govern conforming loans, and a jumbo is above that limit. Jumbo investors set their own treatment, and some are tighter on RSUs than the agencies while others are looser. Also, Fannie Mae restructured its income chapter in a recent announcement, so older references to RSU policy point to a different section number.
On jumbo files, the RSU question usually gets decided before the structure question. If the lender counts only part of your vested stock, that shapes the loan size more than the choice between interest-only and amortizing.
Is Your Loan Really Jumbo?
“Jumbo” is county-specific. FHFA sets conforming limits by area and by unit count, with higher limits where local home values are high. A loan can be conforming in one county and jumbo in the next. The county lookup is at fhfa.gov/CLL. A jumbo loan begins one dollar above that county’s limit.
That matters here because many tech buyers sit near the line. Lendmire’s jumbo loan programs start where the conforming limit ends, and the choice between a conforming loan with a larger down payment and a jumbo loan is worth running before you pick a structure.
When Amortizing Is the Better Fit
Choose amortizing when most of these are true:
- RSUs make up a large share of your total pay.
- Your vesting history is short, or a refresh grant is uncertain.
- Your reserves are thin once you count taxes owed on vests.
- You want the balance to fall without relying on discipline or a plan.
- You expect to hold the home a long time.
The strength of the amortizing loan is that it asks nothing of you later. No reset, no conversion, no scramble if the stock drops. The ratio ceiling is also looser on the fixed lanes, at 50% versus 43% on the interest-only lanes. That difference can matter if your qualifying income is already stretched by how the lender counts RSUs.
The cost is a higher required payment in the early years. For a borrower with lumpy income, that is often a fair trade for certainty.
When Interest-Only Is the Better Fit
Interest-only earns its place in narrower cases:
- You have deep liquid reserves outside your employer’s stock.
- Your base salary alone can carry the post-reset payment.
- You have a specific use for the freed cash, such as diversifying out of concentrated stock or funding other goals.
- You plan to make voluntary principal payments after vests, and you will actually do it.
- You may sell or refinance before the reset, and you can live with the risk that neither is available.
Run the post-reset test honestly. Under federal ability-to-repay rules, the CFPB’s compliance guide says lenders must evaluate repayment on payments that cover principal and interest over the remaining term. So the interest-only structure does not buy you a larger loan on the lender’s math. Interest-only loans also fall outside the General Qualified Mortgage category, so they are non-QM files, and lender guidelines vary on what they accept.
The common failure on these files: the borrower models the low payment, then discovers the file is being qualified on the higher one. Plan around the higher number from day one.
The RSU Stress Test
Run both structures through four scenarios before choosing.
1. Stock falls. The 200-day average moves slowly, so qualifying income may hold at application. After closing, your real cash flow follows the actual share price. An amortizing payment is steady. An interest-only payment is lower now, but the reset arrives into the same weaker stock.
2. Refresh grants shrink. Your vesting calendar thins out. The amortizing borrower feels it in monthly cash. The interest-only borrower feels it at the reset, which is worse if the reset is a few years away.
3. Job change or layoff. Fannie Mae measures RSU history with the current employer, and a new job can restart the clock for time-based awards. A fully amortizing loan with lower balance exposure is easier to refinance or sell from.
4. Vest timing. Shares often vest quarterly or annually, and tax withholding trims what arrives. A monthly payment is fixed, while the cash behind it comes in lumps. Many borrowers hold a cash buffer sized to cover several payments between vests.
An interest-only borrower should assume the reset cannot be refinanced away. Reliance on refinancing or selling at reset is the weakest part of the plan, because both depend on credit, appraisal, and market conditions at that time.
Hybrid Approach: Amortizing Plus Extra Principal
Many RSU earners can get most of the flexibility without the structure risk. Take the amortizing loan. After each vest, send extra principal toward the balance. If a vest is light, skip the extra payment and make only the required one.
The lender sees a conventional amortizing file. You see a payment you can always make, plus a way to move faster when stock cooperates. Check the note for prepayment terms before relying on this, since they vary by loan.
The reverse is the interest-only borrower who promises to make voluntary payments but does not. Equity then builds only through appreciation. Be honest about which borrower you are.
Decision Matrix by Borrower Profile
| Profile | Likely Fit | Reason |
|---|---|---|
| High base salary, modest RSUs | Either | Base covers the payment either way |
| RSU-heavy pay, long vesting history | Amortizing | Predictable payment, lower reset risk |
| Recent hire, thin vesting history | Amortizing | RSUs may not count, so payment must fit salary |
| Large outside reserves, planned diversification | Interest-only | Freed cash has a defined use |
| Stock concentrated in one employer | Amortizing | Avoids stacking reset risk on stock risk |
A Self-Check Before You Talk to a Loan Officer
Ask yourself:
- Can my base pay and bonus carry the fully amortizing payment without any RSU income?
- How many payments’ worth of cash sits outside employer stock?
- Where exactly will the saved cash go, and have I done that before?
- What happens to my plan if the stock drops by a third before the reset?
- Is my vesting history long enough for this lender to count it?
If you hesitate on the first or fourth question, lean amortizing.
Key Terms Defined
Amortizing loan: A loan where each scheduled payment covers interest and some principal, so the balance falls over time.
Interest-only period: The initial stretch where the required payment covers interest only and the scheduled balance does not fall.
Reset: The point where the loan converts and the payment rises because principal is now due over the remaining term.
Negative amortization: A different feature where payments fall below the interest owed, so the balance grows. The CFPB treats it separately from interest-only.
200-day average: The moving average stock price some lenders use to value vested shares for income.
Reserves: Liquid assets, counted in months of the full payment, that a lender wants to see after closing.
Final Verdict
Amortizing is the safer default for a tech employee on RSUs, and it is the right answer for most. Interest-only is a deliberate choice for a borrower with strong reserves, a base salary that carries the reset, and a plan for the freed cash. A few borrowers can honestly say yes to all three. Many cannot.
Tax treatment can depend on your situation; borrowers should speak with a qualified tax professional before relying on any deduction or credit.
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 related reading on how lean income documentation changes the structure choice, see Lendmire’s piece Interest-Only vs Amortizing Super Jumbo When Tax Returns Run Lean.
Frequently Asked Questions
Do my unvested RSUs count toward qualifying?
Generally no. Under the Fannie Mae benchmark, only vested stock distributed without restrictions counts, and sign-on RSUs that vest over time are excluded. Jumbo lenders set their own rules, so treatment varies by lender.
Does interest-only let me qualify for a bigger loan?
No, not on the lender’s math. Lenders must test repayment using principal-and-interest payments over the remaining term, so the low early payment does not raise your loan size. Guidelines vary by lender.
What happens when the interest-only period ends?
The payment rises because principal and interest are both due over fewer remaining years. Your options are to absorb it, refinance, or sell, and the last two depend on conditions at that time.
Can I prepay an amortizing jumbo after a big vest?
Often yes, but prepayment terms depend on the note. Read it before relying on extra principal as part of your plan.
Would a conforming loan make more sense?
Possibly, if your price sits near the county limit. Check your county at FHFA’s lookup, then compare a larger down payment on a conforming loan against a jumbo structure.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
Lendmire — NMLS# 2371349 — is a mortgage broker that arranges FHA, VA, conventional and jumbo home purchase and refinance financing in 16 states through wholesale lenders. Every option is subject to the lender’s guidelines and full underwriting. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Fannie Mae Selling Guide B3-3.3-07: RSU Income
2. Fannie Mae Announcement SEL-2026-02
3. FHFA – 2026 Conforming Loan Limit Values
4. FHFA – Conforming Loan Limits
5. CFPB – ATR/QM Small Entity Compliance Guide
This article is part of Lendmire’s jumbo loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How to Match a Jumbo File to the Lane With the Most Leverage · How to Qualify for a Jumbo Loan by Paying Off Debts at Closing · Jumbo Cash-Out Lanes for a Homeowner With RSUs or Deferred Comp
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Legal disclosures. Lendmire (NMLS# 2371349) is a state-licensed mortgage brokerage that arranges financing through wholesale lender relationships. Lendmire is not a direct lender, depository institution, or registered financial advisor. The discussion above is general informational content about real estate financing — it is not financial, legal, or tax advice, and readers should consult licensed professionals for guidance on their individual circumstances. Loan inquiries are subject to lender underwriting; this article does not represent a commitment to lend. Loan terms, rates, and qualification standards vary by borrower, property, and state, and are subject to change at any time. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.