Most tech employees are surprised to learn that mortgage lenders use a specific formula to calculate RSU income. The formula involves W-2 history, stock price averaging, and program-specific rules that vary by lender.
This guide walks through every step so you can estimate your qualifying income before you sit down with a lender. If you’re still wondering whether RSU income counts at all, start with our overview of which loan programs accept RSU income, then come back here for the math.
Why the Calculation Is More Complicated Than It Looks
RSUs are variable income. Unlike a fixed salary, lenders cannot simply use the current market value of your stock position. Stock prices move daily, vest schedules vary, and the number of shares you receive can change from grant to grant.
To account for this, lenders use smoothed, backward-looking calculations that prioritize stability over current value. Different loan programs use different methods, which means the same borrower can qualify for different amounts depending on which lender and program they choose.
Three main approaches exist: the two-year historical average (the Fannie Mae/Freddie Mac standard), the 200-day moving average forward projection, and jumbo/portfolio lender methods. Understanding all three helps you identify which program maximizes your buying power.
Method 1: The 2-Year Historical Average (Fannie Mae / Freddie Mac)
This is the most common calculation method for conventional loans. It uses your actual documented income from prior tax years, not projections or current stock prices.
Step 1: Pull Your RSU Income From Your W-2s
Locate Box 1 on your W-2 for each of the last two tax years. RSU vesting income appears here combined with your base salary as total wages. To isolate the RSU portion, reference your pay stubs (which show individual RSU vest events) or request a compensation summary from your employer’s equity plan portal.
One important note: if you changed employers during those two years, income from the prior employer generally cannot be combined with income from your current employer for this calculation.
Step 2: Add Up the RSU Income for Each Year
Record the RSU-specific income for each year separately. If one year is significantly lower due to a stock price dip, a different grant size, or fewer vest events, note that. Lenders may treat a declining trend differently than stable or rising income.
Step 3: Calculate the 2-Year Average
The formula is straightforward: (Year 1 RSU Income + Year 2 RSU Income) ÷ 2 = Annual Qualifying RSU Income. Then divide by 12 to get the monthly figure your lender will use.
| Input | Amount |
|---|---|
| Year 1 RSU income (W-2) | $60,000 |
| Year 2 RSU income (W-2) | $90,000 |
| 2-year average | $75,000/year |
| Monthly qualifying RSU income | $6,250/month |
If RSU income is trending downward (Year 2 lower than Year 1), some lenders will use the lower figure rather than the average. If it’s trending upward, most lenders will use the average, which works in your favor.
Step 4: Confirm Future Continuation
The calculation alone isn’t enough. Lenders also require proof that RSU income will continue for at least three more years. You’ll need your current vesting schedule from your equity plan portal showing upcoming vest dates and share amounts. Without this document, even two years of perfect W-2 history may not be sufficient.
Method 2: The 200-Day Moving Average (Forward Projection)
This method is used when lenders are projecting income from unvested shares, or when a forward-looking approach supplements the historical average. It’s particularly relevant for borrowers whose RSU grants have increased significantly or whose stock price has changed materially since prior vest events.
What the 200-Day Moving Average Is
The 200-day moving average (200-day MA) is the average of a stock’s closing price over the past 200 trading days. Fannie Mae uses this figure to value unvested shares for projection purposes. Freddie Mac uses a 52-week average, which produces a similar but not identical result.
Both methods smooth out short-term volatility and give a conservative, defensible number. You can find the 200-day MA on Yahoo Finance, Google Finance, or your brokerage platform under “Technical” or “Statistics.”
How the Projection Calculation Works
Start by finding the 200-day MA for your company’s stock. Multiply that by the number of shares scheduled to vest over the next 12 months. That gives you the projected annual RSU income from unvested shares.
Many lenders then apply a haircut to this projected figure, typically 25%, to further account for volatility risk. The result is blended with your historical average for a final qualifying income number under some programs.
Worked Example: Nvidia Employee
| Input | Value |
|---|---|
| Unvested shares remaining | 1,200 shares |
| Vesting schedule | 300 shares/quarter (12 months) |
| NVDA 200-day MA | $110/share |
| Quarterly projected vest | 300 x $110 = $33,000 |
| Annual projected RSU income | $33,000 x 4 = $132,000 |
| After 25% lender haircut | $132,000 x 0.75 = $99,000 |
This projected figure may be used alongside your historical W-2 average, depending on the loan program. The 200-day MA method is most useful when your current grants are significantly larger than your historical income, as it captures the upward trajectory that a backward-looking average would understate.
Method 3: The Jumbo / Portfolio Lender Approach
Jumbo loans are portfolio products held by private investors, not sold to Fannie Mae or Freddie Mac. Each investor sets their own guidelines, making these the most flexible option for RSU income.
Common jumbo calculation approaches include: using the same two-year historical average as conventional loans but without any percentage cap on RSU income; using only the most recent 12 months if income is trending upward; applying a blended method that combines 100% of the historical average with 50–75% of projected future vested RSUs; or crediting a portion of unvested shares at 75% of the current share price.
This variability is exactly why working with us matters. JVM, with relationships across multiple jumbo investors, can identify which methodology fits your specific income profile before you apply. If one investor’s calculation method undervalues your RSU income, another may treat it more favorably.
Full Worked Example: Cisco Employee Buying in San Jose
| Borrower Profile | Detail |
|---|---|
| Employer | Cisco, San Jose |
| Base salary | $220,000/year |
| RSU grant | $100,000/year (quarterly vesting) |
| Year 1 RSU income (W-2) | $95,000 |
| Year 2 RSU income (W-2) | $105,000 |
Conventional (Fannie Mae) Calculation
The two-year RSU average is ($95,000 + $105,000) ÷ 2 = $100,000 per year. Total qualifying income becomes $220,000 (base) + $100,000 (RSU) = $320,000 per year, or $26,667 per month. At a 43% debt-to-income ratio, this supports approximately $11,467 per month in total housing expense, which translates to roughly a $1.65M to $1.75M mortgage depending on rates, taxes, and insurance.
Without RSU Income
Base salary only: $220,000 ÷ 12 = $18,333 per month. At 43% DTI, this supports roughly $1.05M to $1.1M in mortgage. RSU income added over $600,000 in purchasing power. In San Jose, where the median home price exceeds $1.3 million, that gap determines whether you can buy the home you want or settle for a smaller budget.
Common Calculation Mistakes to Avoid
Using your brokerage balance instead of W-2 income
Your brokerage account shows the current value of shares you hold. Lenders care about the income recorded on your W-2 when shares vested. These are completely different numbers.
Counting unvested RSUs at full projected value
Most lenders apply a 25% or greater haircut to projected income from unvested shares. Using the full value overstates your qualifying income.
Forgetting tax withholding
When RSUs vest, the full fair market value is taxable as ordinary income. Employers typically withhold at the federal supplemental rate of 22%, but for high earners in California, the actual combined rate can reach 45–54%. You may have more income on paper than cash in your account.
Ignoring a declining income trend
If Year 2 RSU income is lower than Year 1, don’t assume lenders will use the average. Some underwriters will use the lower figure exclusively or raise concerns about continuation.
Assuming both employers’ RSU income can be combined
If you changed jobs in the last two years, income from a prior employer you no longer work for typically cannot be counted toward your RSU qualifying income.
The Phantom Income Problem: RSU Taxes and Cash Flow
This is one of the least-discussed but most impactful issues for tech workers who use RSU income to qualify. When RSUs vest, the full fair market value is taxable as ordinary income immediately. Your employer withholds taxes at the point of vesting, but the standard supplemental withholding rate of 22% often falls short of the actual tax liability.
For a California tech worker in the highest brackets, the real combined federal plus state rate on RSU income can approach 50%. This creates a gap: you have more income on your W-2 than cash in your bank account. The IRS will collect the difference when you file your return.
Lenders may review your liquid assets to confirm you can cover outstanding tax liabilities while making mortgage payments. Before applying, work with a CPA to calculate your estimated current-year tax obligation, including any upcoming vest events. Knowing your actual after-tax cash position avoids surprises during underwriting.
Frequently Asked Questions
What if I only have one year of RSU income on my W-2?
Most conventional lenders won’t count it yet. Some jumbo lenders and Freddie Mac (with strong compensating factors like excellent credit, a large down payment, or a stable long-tenured employer) may accept 12 months. Plan your application timeline around when you’ll have two full years of documented history.
Does today’s stock price affect my qualifying income?
For historical income (the W-2 method), no. That income is already recorded. For forward projections using unvested shares, yes. Lenders use the 200-day moving average (Fannie Mae) or 52-week average (Freddie Mac), not the spot price.
What if my company’s stock dropped significantly this year?
Your historical W-2 income doesn’t change retroactively. However, a major stock decline may reduce any forward projection component and could raise underwriter concerns about whether your RSU income will continue at prior levels.
Can I use RSU income from two different employers?
Generally, only if both are publicly traded and you have a two-year history at each company. Income from a prior employer you no longer work for typically cannot be counted, because the continuation requirement can’t be met.
Why Work With JVM Lending for Your RSU Mortgage
The calculation method your lender uses directly affects how much home you can afford. JVM Lending works with multiple wholesale lenders and jumbo investors, each with different RSU income calculation methodologies. Our job is to match your specific compensation structure to the lender and program that maximizes your qualifying income.
If you’ve run the numbers and want to see how they translate into a real pre-approval, JVM’s team can walk you through it.
Want us to run the RSU income calculation for your specific situation? Contact JVM Lending for a free income analysis.
