Restricted Stock Tax Calculator: The Complete 2026 Guide

Introduction

You got equity. Now comes the part nobody prepares you for the tax bill.

Restricted stock units are showing up in more compensation packages across the tech industry, and most employees don’t realize they owe ordinary income tax the moment their shares vest. Not when they sell. Not at the end of the year. Right at vesting. Miss that, and you’re looking at a nasty surprise come April 15.

The restricted stock tax calculator at Share Incentive Plan Calculator cuts through that confusion fast. Punch in your vesting date, share price, and number of shares and it tells you exactly what you owe. No guesswork, no spreadsheet rabbit holes.

What Is a Restricted Stock Tax Calculator & What Does It Do?

A restricted stock tax calculator is a tool that estimates your total tax liability when restricted stock units vest or when a restricted stock award settles. It takes your equity compensation details and maps them against federal income tax brackets, FICA taxes, and your state income tax rate all in one place.

Here’s the thing: equity compensation taxation is genuinely confusing. A W-2 employee in California earning $130,000 base salary will pay a very different effective rate on their RSUs than someone earning the same amount in Texas because California taxes RSU income as ordinary income at rates up to 13.3%, while Texas has no state income tax at all.

The calculator handles that gap. You enter your situation; it models the outcome.

What it covers:

• Ordinary income tax owed at vesting (federal + state)
• FICA taxes — Social Security (6.2% up to the $176,100 wage base in 2026) and Medicare (1.45%, plus the 0.9% Additional Medicare Tax if you’re over the threshold)
• Capital gains tax if you hold shares after vesting and sell later
• Estimated after-tax value of your equity position
• Flat withholding rate comparison (22% federal supplemental rate vs. your actual marginal tax rate)

What is a restricted share, exactly? It’s company stock granted to an employee that comes with conditions usually a vesting schedule tied to continued employment. Until those conditions are met, you don’t fully own the shares. Once they vest, the fair market value on that date becomes taxable income.

How Is Restricted Stock Value Calculated?

The IRS treats vested restricted stock as ordinary income. The taxable amount is based on the fair market value (FMV) of the shares on the vesting date not the grant date, not the sale date.

Core Formula:

Taxable Income at Vesting = Number of Shares Vested × Share Price at Vesting (FMV)

Federal Tax Owed = Taxable Income × Federal Marginal Tax Rate

State Tax Owed = Taxable Income × State Income Tax Rate

FICA = Taxable Income × (Social Security Rate + Medicare Rate)

Total Tax Liability = Federal Tax + State Tax + FICA

---

Per IRS Publication 525, the fair market value of property received as compensation including restricted stock is included in gross income in the year it’s received or becomes substantially vested.

Every variable matters here. A $50 stock that vests 500 shares generates $25,000 of taxable income. At a 24% federal bracket, that’s $6,000 in federal tax alone before state taxes and FICA. The restricted stock tax calculator runs all of this simultaneously so you’re not doing five separate calculations by hand.

Cost basis is set at the FMV on the vesting date. That matters later when you sell. If you sell immediately (a same day sale), there’s typically no capital gains tax because the sale price equals the cost basis. Hold longer, and the difference between your sale price and cost basis becomes either short-term or long-term capital gains.

How to Use the RSU Tax Calculator (Step-by-Step)

The RSU Tax Calculator is built for speed. Here’s exactly how to fill it in:

Step	Field	What to Enter
1	Number of Shares Vesting	Total shares vesting in this event (e.g., 500)
	Share Price at Vesting (FMV)	Stock’s closing price on the vesting date (e.g., $85.00)
3	Federal Tax Bracket	Your marginal tax rate — 22%, 24%, 32%, 35%, or 37%
4	State of Residence	Select your state — calculator applies the correct state income tax rate
5	Additional Income (Optional)	Other W-2 income this year — helps the calculator place you in the right bracket
6	Withholding Already Applied	If your employer already withheld at the flat 22% supplemental rate, enter it here

Step 1: Enter number of shares vested. This is the batch vesting in this specific event — not your total grant. RSU vesting schedules typically release shares in tranches (quarterly, annually, or on a cliff schedule).

Step 2: Enter the share price at vesting. Use the closing price on the actual vesting date. Your brokerage statement or stock plan portal will show this. This is the figure the IRS uses to calculate your taxable income.

Step 3: Select your federal tax bracket. If you’re unsure, use last year’s tax return as a reference. Your W-2 box 1 income plus the value of vesting shares determines your bracket.

Step 4: Select your state. State income tax rates vary from 0% (Texas, Florida, Nevada, Washington) to over 13% (California). This step alone can swing your result by thousands of dollars.

Step 5: Add any additional income. This is optional but improves accuracy. If you earned a bonus or have freelance income this year, including it here helps the calculator identify whether you’ll hit the Additional Medicare Tax threshold ($200,000 for single filers).

Step 6: Review your results. The calculator outputs your estimated total tax liability, after-tax value of the vesting event, and the gap between the 22% flat withholding rate and your actual marginal tax rate — which is where under-withholding typically hides.

Worked Example: A Software Engineer in Austin, Texas

Say a software engineer in Austin, Texas gets 600 RSUs vesting on March 15, 2026. The stock price on that date is $92.

Inputs:

• Shares vested: 600
• Share price at vesting (FMV): $92.00
• Total taxable income from vesting: $55,200
• Base salary: $140,000
• Total W-2 income this year (including RSU vest): $195,200
• Federal tax bracket: 32%
• State income tax (Texas): 0%
• Social Security rate: 6.2% (up to $176,100 wage base already exceeded with base salary)
• Medicare: 1.45% + 0.9% Additional Medicare Tax (income over $200,000 threshold not triggered here)

Calculations:

Taxable Income from RSUs = 600 × $92 = $55,200

Federal Income Tax (32%) = $55,200 × 0.32 = $17,664

Social Security Tax = $0 (wage base already exceeded by salary)

Medicare Tax (1.45%) = $55,200 × 0.0145 = $800.40

State Income Tax (Texas) = $0

Total Tax Liability = $17,664 + $800.40 = $18,464.40

Results Summary:

---

Item	Amount
Gross RSU Value at Vesting	$55,200.00
Federal Income Tax (32%)	$17,664.00
Medicare Tax (1.45%)	$800.40
Social Security Tax	$0.00 (wage base exceeded)
Texas State Income Tax	$0.00
Total Tax Liability	$18,464.40
After-Tax Value	$36,735.60
Employer Flat Withholding (22%)	$12,144.00
Under-Withholding Gap	$6,320.00

That $6,320 gap is what trips people up. The employer withheld at the 22% flat supplemental withholding rate which is what most payroll systems default to. But this engineer is actually in the 32% bracket. That $6,320 difference is owed at tax time. Without estimated quarterly tax payments, this person faces a penalty and a large April 15 check.

Understanding Your Results

Once the calculator runs, you’ll see four core outputs. Here’s what each one means in plain terms.

Taxable Income from Vesting. This is your RSU income shares vested multiplied by the fair market value on the vesting date. It’s added to your W-2 and taxed as ordinary income in the year it vests, per IRS Publication 525.

Total Tax Liability. Federal income tax plus state income tax plus FICA. This is what you owe in total on this vesting event not what your employer withholds. Those two numbers are often very different.

After-Tax Value. What you keep after all taxes are paid. For tech employees in high-tax states like California or New York, this can be 45–55 cents on the dollar at senior compensation levels. In zero-income-tax states, it’s closer to 65–70 cents.

Under-Withholding Gap. The most actionable number. If your employer withheld at 22% and your actual marginal tax rate is 35%, this gap is the extra amount you’ll owe. Use this figure to set up estimated tax payments via IRS Form 1040-ES or adjust your W-4 withholding after each vest.

Restricted Stock Awards vs. RSUs: A Side-by-Side Comparison

These two equity types look similar on the surface. They’re not. RSA taxation and RSU taxation follow different rules, different timing, and different planning strategies.

Feature	Restricted Stock Award (RSA)	Restricted Stock Unit (RSU)
What you receive at grant	Actual shares (subject to forfeiture)	Promise of future shares
Taxation trigger	Vesting date (or grant date with 83(b) election)	Vesting date always
83(b) Election available?	Yes taxes paid upfront at grant price	No IRS prohibits 83(b) for RSUs
Dividend treatment	Yes dividends on unvested shares possible	Dividend equivalents (cash) taxed as income
Voting rights before vesting	Sometimes	No
What is a restricted share (RSA)?	A share with forfeiture conditions	Not applicable RSUs are units, not shares
Tax form issued	W-2 (income portion) + 1099-B (on sale)	W-2 (income portion) + 1099-B (on sale)
FICA applies?	Yes at vesting (or at grant with 83(b))	Yes at vesting
Capital gains clock starts	At vesting (or grant date with 83(b))	At vesting date

The 83(b) election is the biggest practical difference. With a restricted stock award, an employee can file an 83(b) election within 30 days of grant, pay ordinary income tax on the (typically low) grant-date value, and start the capital gains holding period immediately. If the stock appreciates significantly, all future gains are taxed at long-term capital gains rates instead of ordinary income rates.

RSUs get none of that. The IRS explicitly bars 83(b) elections for RSUs under IRS Notice 2005-1. Every RSU vest is an ordinary income event. Full stop.

For employees in high tax brackets, that distinction alone can cost tens of thousands of dollars in additional tax over a career. The ESOP Calculator can help model those longer-term equity scenarios if your plan involves both RSAs and broader ownership structures.

Short-Term vs. Long-Term Capital Gains on Restricted Stock

Vesting is the income event. Selling is the capital gains event. Most tech employees conflate the two and that confusion leads to poor timing decisions.

Scenario	Holding Period	Tax Rate Applied
Same day sale	0 days	No capital gains (sale price = cost basis)
Sell within 12 months of vesting	Under 1 year	Short-term capital gains taxed as ordinary income
Sell more than 12 months after vesting	Over 1 year	Long-term capital gains 0%, 15%, or 20% depending on income
High earner (income > $200K single / $250K married)	Any	Add 3.8% Net Investment Income Tax (NIIT) on gains

The holding period clock starts on the vesting date not the grant date. If 500 shares vest on January 10, 2026, and you sell on January 11, 2027, you qualify for long-term capital gains treatment on any appreciation above the vesting-date FMV.

Short-term capital gains are taxed at the same rate as ordinary income. For a tech employee in the 35% federal bracket, that means selling too early costs real money. A $20,000 gain taxed at 35% leaves $13,000. The same gain held long enough to qualify for the 15% long-term rate leaves $17,000. A $4,000 difference from one timing decision.

The Long-Term Incentive Calculator can help model multi-year holding scenarios where the capital gains rate difference compounds across a full vesting schedule.

RSA Taxation vs. RSU Taxation: What Changes at the State Level

Federal RSU tax rules are uniform across all 50 states. State rules vary — and some states have quirks that can genuinely change your planning.

California (13.3% top rate): California taxes all RSU and RSA income as ordinary income at the time of vesting. It also has its own AMT. For a tech employee in the Bay Area earning $200,000+ base plus significant RSU vests, effective state tax alone can exceed 10% on equity income. California does not recognize the federal long-term capital gains preference gains are taxed at ordinary income rates at the state level.

New York (up to 10.9% state + 3.876% NYC): New York City adds a local income tax on top of state. A tech employee in Manhattan can face a combined federal, state, and city marginal rate well above 50% on RSU income in the top bracket.

Texas, Florida, Nevada, Washington: No state income tax on wages or equity compensation. This is a legitimate, significant advantage for employees at companies in those states or remote employees who have established residency there.

Multi-state situations: Employees who vest shares while living in one state and later move to another face potential double taxation. California, in particular, is aggressive about taxing RSU income that accrued while the employee lived there even after they’ve moved. Per California Franchise Tax Board guidance, the taxable portion is prorated based on the number of days the employee worked in California during the vesting period. Exact treatment depends on your specific plan and dates consult a licensed CPA familiar with multi-state equity taxation.

For a deeper look at how employee stock purchase plans interact with state tax rules, the ESPP Calculator covers qualifying and disqualifying dispositions across different state scenarios.

Common Mistakes & Misconceptions

Mistake 1: Thinking tax is due when you sell, not when you vest.

The single most common misunderstanding in RSU taxation. Tax on restricted stock units is owed at vesting the IRS treats the vested shares as ordinary income in that tax year. Waiting until you sell to think about taxes means you’ve already missed your chance to set aside cash or adjust withholding.

Mistake 2: Assuming the 22% flat withholding rate covers everything.

It doesn’t not for most senior tech employees. The 22% supplemental wage withholding rate is a federal default. If your marginal tax rate is 32%, 35%, or 37%, the gap is your problem. A tech employee with $300,000 in combined W-2 and RSU income will owe significantly more than 22% at the federal level alone.

Mistake 3: Ignoring restricted stock dividends.

Some RSA plans pay restricted stock dividends on unvested shares. Per IRS rules, dividends on restricted stock are taxed as ordinary income — not at the qualified dividend rate until the stock vests. This is different from how most employees expect dividend income to work, and it can push taxable income higher than anticipated.

Mistake 4: Confusing restricted shares vs. options.

Restricted stock (RSUs and RSAs) and stock options are different animals. Stock options give you the right to buy shares at a fixed price (the strike price). Restricted stock is granted outright, subject to vesting conditions. The tax timing, the forms involved (Form 3921 for ISOs, W-2 for RSUs), and the planning strategies are all different. The restricted stock tax calculator is built specifically for RSUs and RSAs not for modeling stock options or ESPPs.

Mistake 5: Skipping estimated quarterly tax payments after a large vest.

If a single vesting event generates more than $1,000 in additional tax owed, IRS Safe Harbor rules recommend making estimated quarterly tax payments to avoid penalties. The schedule is April 15, June 15, September 15, and January 15 for the prior year’s fourth quarter. Missing these doesn’t mean you can’t pay at tax time it means you’ll pay a penalty on top.

Misconception: RSUs and RSAs are treated the same way for tax purposes.

Close but not identical. RSA taxation allows the 83(b) election; RSU taxation does not. RSAs can pay actual dividends on unvested shares; RSUs pay dividend equivalents treated as ordinary income. RSAs give you shares immediately (with restrictions); RSUs give you nothing until vesting. The tax forms differ, the FICA timing differs slightly in some multi-year plans, and the planning strategies are genuinely distinct.

When NOT to Rely Only on This Calculator

The restricted stock tax calculator gives you a solid estimate. There are situations where that estimate isn’t enough.

When you have multi-state vesting history. If you lived in California, New York, or another aggressive tax state during part of your vesting period and have since moved, the calculator can’t model the proration rules those states apply. You need a CPA who handles multi-state equity taxation.

When you’re also exercising stock options in the same year. Mixing RSU income with ISO exercises or NSO exercises creates overlapping AMT exposure, ordinary income layering, and capital gains timing decisions that interact in ways a single-purpose calculator can’t fully capture.

When your total equity income exceeds $500,000 in a year. At this level, the 37% federal bracket, the 3.8% Net Investment Income Tax, and potential Alternative Minimum Tax all interact. The rounding assumptions in any online tool are not sufficient for tax planning at this scale you need a CPA or CFP with equity compensation experience.

When your company is private. If your company hasn’t gone public, fair market value is based on a 409A valuation, not a public market price. That valuation involves assumptions a calculator can’t replicate. RSU taxation on private company stock also involves liquidity considerations the tool doesn’t model.

When you’re within 30 days of an RSA grant. If you received a restricted stock award recently, the 83(b) election window is 30 days from the grant date no extensions. This decision can save or cost you significant money, and it’s irreversible. Don’t make it based on an online calculator alone.

Tips to Get the Most Accurate Results

Use the actual vesting date FMV, not the grant price. Your brokerage’s stock plan portal shows the per-share price used to calculate your W-2 income. Use that number not the price you see when you log in today.

Account for all income sources. RSU income is stacked on top of your salary, bonuses, freelance income, and any other W-2 or 1099 income. The calculator needs your full expected annual income to place you in the correct tax bracket and identify whether you’ll hit the Additional Medicare Tax threshold.

Run the calculator before the vest, not after. The point of the tool is to help you plan adjust withholding, set aside cash, or schedule estimated tax payments. If you only run it after vesting, you’ve already locked in the income event.

Check your employer’s withholding method. Some companies use the 22% flat supplemental rate. Others withhold at your actual W-4 rate. Some use the aggregate method. Knowing which method your employer uses tells you immediately whether you’re likely to be under-withheld.

Model different holding scenarios. Run the calculator once for an immediate same day sale. Run it again assuming you hold for 12+ months to get long-term capital gains treatment. The difference between those two numbers is the tax cost of patience — and sometimes it’s worth it, sometimes it isn’t.

Don’t forget payroll. FICA taxes apply to RSU income in the year it vests. Social Security (6.2%) only applies up to the $176,100 wage base in 2026 — if your base salary already exceeds that, no additional Social Security is owed on the RSU income. Medicare (1.45%) has no wage base cap and applies to all RSU income.

Frequently Asked Questions

Q: How are RSUs taxed when they vest?

When restricted stock units vest, the fair market value of the shares on the vesting date is treated as ordinary income and reported on your W-2, per IRS Publication 525. Your employer is required to withhold federal income tax (typically at the 22% supplemental rate), Social Security, and Medicare at the time of vesting. You owe any additional tax above the withheld amount when you file your tax return.

Q: How do I calculate RSU tax owed if my employer withholds at 22% but I’m in a higher bracket?

Subtract 22% from your actual marginal federal tax rate, then multiply that percentage by your total RSU taxable income. That’s your under-withholding gap. For example, if you’re in the 32% bracket and your RSU taxable income was $60,000, your gap is ($60,000 × 10%) = $6,000 owed at filing. Set aside that amount now or make an estimated quarterly tax payment to IRS Form 1040-ES.

Q: What is the restricted stock tax rate for federal income tax?

There’s no single restricted stock tax rate RSU income is taxed at your ordinary income marginal tax rate. For 2026, federal brackets run from 10% to 37%. Most tech employees with meaningful equity compensation land in the 22%, 24%, 32%, or 35% brackets depending on total W-2 income. The calculator applies the correct marginal rate based on your total income input.

Q: When do you pay tax on restricted stock units?

Tax on RSUs is due in the tax year the shares vest not when you sell. If shares vest on November 1, 2026, the tax is owed by April 15, 2027 (Tax Day), or earlier through estimated quarterly tax payments if your withholding is insufficient. Holding the shares after vesting doesn’t defer the income tax; it only starts the capital gains holding period clock.

Q: Is RSU tax withholding always enough to cover what I owe?

Rarely, for senior tech employees. Employer withholding defaults to the 22% flat supplemental wage withholding rate for federal taxes. If your effective marginal rate is higher which it almost always is at $150,000+ combined income you’ll owe additional tax at filing. IRS Safe Harbor rules recommend paying at least 90% of your current-year tax liability or 100% of the prior year’s tax (110% if prior-year AGI exceeded $150,000) to avoid an underpayment penalty.

Q: How does selling restricted stock affect my taxes differently than vesting?

Vesting creates ordinary income taxed at your marginal rate, with FICA. Selling creates capital gains (or losses). If you sell immediately after vesting (same day sale), the gain is typically zero because the sale price matches the cost basis (the vesting-date FMV). If you sell after holding for more than 12 months, any appreciation above the vesting-date FMV is taxed at long-term capital gains rates 0%, 15%, or 20% depending on income, plus 3.8% NIIT for high earners. The two tax events vesting and selling are separate and reported on separate forms (W-2 and Form 1099-B, respectively).

Q: What is the difference between restricted stock awards tax treatment and RSU taxation?

The main difference is the 83(b) election. With a restricted stock award, you can elect to pay ordinary income tax at grant based on the grant-date FMV which is typically low and start the capital gains holding period immediately. RSUs don’t qualify for the 83(b) election per IRS Notice 2005-1, so you always pay ordinary income tax at vesting. RSA taxation can be significantly more favorable if the stock appreciates substantially between grant and vesting.