---
title: "New York RSU Tax Calculator (2026): Withholding, Shortfall, and Vesting Examples"
slug: ny-rsu-vesting-tax
publishedAt: 2026-06-16T17:00:11.000Z
updatedAt: 2026-06-17T16:41:54.845Z
author: "Mike Navarro"
authorSlug: mike-navarro
category: "State Tax"
tags: ["New York", "RSU", "Withholding", "Vesting", "State Tax"]
excerpt: "New York RSU tax calculator: 22% federal vs NY's 11.7% supplemental and 10.9% top rate, three worked vests — see the gap for your bracket."
canonical: https://myequitytax.com/blog/ny-rsu-vesting-tax
---


<TaxYearBadge year={2025} />
<ReviewedBadge year={2025} />

A New York RSU tax calculator estimates federal and NY state tax on each vest, where NY applies a flat 11.7% supplemental withholding rate on RSU income and a 10.9% top marginal rate. Federal 22% supplemental default usually under-withholds — the calculator shows the dollar gap for your bracket.

<CalculatorCTA calculatorType="rsu" />

[**Open the New York RSU tax calculator with these inputs prefilled →**](/calculator/rsu?state=NY&shares=100&fmv=80&salary=120000)

## How New York taxes your RSU vest

New York treats RSU income like ordinary W-2 wages: when shares vest, the fair-market value on the vest date hits your Form W-2 Box 1 and is taxed under New York's progressive Personal Income Tax ([IRS Publication 525](https://www.irs.gov/publications/p525)). NY brackets climb from 4% to a **top marginal rate of 10.9%** on income above $25,000,000. Most equity-comp earners never see that top bracket, but everyone vesting RSUs in NY hits the published **11.7% supplemental withholding rate** — applied flat on the RSU income at vest by your employer.

The two numbers that matter on every vest:

- **Federal supplemental withholding rate:** 22% on RSU income up to $1M ([IRS Publication 15](https://www.irs.gov/publications/p15)). Above $1M, the rate jumps to 37%.
- **New York supplemental withholding rate:** 11.7% on RSU income, applied flat regardless of bracket. That rate sits above NY's actual marginal rate for most households, so the state side typically over-withholds.

If your federal marginal bracket is higher than 22%, your employer is under-withholding on the federal side, and the federal gap is what hurts most NY RSU earners — not the state.

## Worked examples (New York, 2025)

These three scenarios use the EquityTax calculator with the inputs shown. The math is identical to what you'll see when you click through to the calculator. NY is in the engine's supported-state list (CA / NY / WA / TX), so every dollar below is a direct engine output.

### Example 1 — Junior IC, single filer

**Inputs:** $120K salary, single filer, 100 RSUs vesting at $80 FMV ($8,000 RSU income).

**Result:**

- Federal withholding: $1,760
- New York withholding: $936
- Estimated federal + NY + FICA tax on the vest: $3,012
- Federal shortfall vs default withholding: $160
- State over-withholding: $456
- **Net total shortfall:** $-296 (a small refund — state over-withholding exceeds the federal gap)

Household income of $128,000 puts this filer in the 24% federal bracket, so the 22% supplemental default leaves a $160 federal gap. NY's 11.7% supplemental rate over-collects against this filer's 6% actual state marginal rate, refunding more than the federal shortfall.

[Run this scenario in the calculator →](/calculator/rsu?state=NY&shares=100&fmv=80&salary=120000)

### Example 2 — Mid-level IC, married filing jointly

**Inputs:** $200K salary, married filing jointly, 400 RSUs vesting at $120 FMV ($48,000 RSU income).

**Result:**

- Federal withholding: $10,560
- New York withholding: $5,616
- Estimated federal + NY + FICA tax on the vest: $14,332
- Federal shortfall vs default withholding: $196
- State over-withholding: $2,736
- **Net total shortfall:** $-2,540 (refund)

Household income of $248,000 lands the couple in the 24% federal bracket and a 6% NY marginal rate. The 22% federal default leaves a $196 federal gap, but 11.7% state withholding on $48,000 of RSU income over-collects by $2,736 — leaving a $2,540 net refund on the vest before any other reconciliations.

[Run this scenario in the calculator →](/calculator/rsu?state=NY&shares=400&fmv=120&salary=200000)

### Example 3 — Senior IC, married filing jointly

**Inputs:** $350K salary, married filing jointly, 1,500 RSUs vesting at $200 FMV ($300,000 RSU income).

**Result:**

- Federal withholding: $66,000
- New York withholding: $35,100
- Estimated federal + NY + FICA tax on the vest: $121,035.50
- Federal shortfall vs default withholding: $27,435.50
- State over-withholding: $14,550
- Estimated federal underpayment penalty: $901.98
- **Net total shortfall:** $12,885.50

This is where NY RSU earners get hurt — but not where you'd expect. Household income lands at $650,000, deep into the 35% federal bracket. The employer withholds federal at the 22% default, leaving a $27,435.50 federal gap on $300,000 of RSU income. NY's 11.7% supplemental rate over-collects by $14,550 against the household's 6.85% actual NY marginal rate, which partially offsets the federal gap but does not close it. Without a quarterly estimated payment, the engine projects a $901.98 federal underpayment penalty on top.

[Run this scenario in the calculator →](/calculator/rsu?state=NY&shares=1500&fmv=200&salary=350000)

## Why employer withholding usually isn't enough in New York

The gap on every NY RSU vest is overwhelmingly a **federal** problem. The federal 22% supplemental default is fixed, but the moment your total income crosses into the 24%, 32%, 35%, or 37% brackets your employer is under-withholding on RSU income. NY's 11.7% supplemental rate runs in the opposite direction — it sits above the actual NY marginal rate for most households under the top bracket, so the state side tends to over-collect and refund at filing.

The fix depends on the size of the federal gap:

1. **Adjust your W-4** so paycheck withholding picks up the federal difference across the year ([IRS W-4 instructions](https://www.irs.gov/forms-pubs/about-form-w-4)).
2. **Make a quarterly estimated payment** if the federal shortfall is concentrated around a single vest — the IRS underpayment penalty kicks in around $1,000 of unpaid tax.
3. **Sell-to-cover at vest** — if your broker offers it, this can absorb the federal gap automatically; the NY side usually self-corrects via refund.

<Callout type="warning">
The 22% federal supplemental rate is a default — not your actual marginal rate. If total income puts you in the 32%, 35%, or 37% bracket, federal under-withholding alone can run into five figures on a single senior-IC vest. NY's 11.7% supplemental rate tends to over-withhold relative to your actual NY bracket, but it does not offset a large federal gap dollar-for-dollar.
</Callout>

## How the New York RSU tax calculator handles state and city rates

The NY calculator uses New York's actual 2025 brackets and the published 11.7% RSU supplemental withholding rate, not a generic state placeholder. It walks the full 2025 IRS federal bracket schedule for your filing status and overlays the NY Personal Income Tax schedule on combined wage and RSU income. **NYC residents:** the engine does not yet model the additional NYC city tax (up to 3.876%) — for Manhattan, Brooklyn, Queens, Bronx, and Staten Island residents, expect a meaningful additional liability on top of the NY state figures below.

[Open the calculator with your inputs →](/calculator/rsu?state=NY)

## FAQ

**Does New York charge a higher rate on RSU income than on regular salary?**
No. NY applies the same Personal Income Tax brackets to RSU vest income and salary — both are ordinary income. The 11.7% supplemental withholding rate is a flat employer-side rate, not an actual marginal rate; your tax-time liability is reconciled against your real NY bracket.

**Why does the calculator show my New York side as a refund?**
NY's published 11.7% supplemental rate sits above the actual NY marginal rate for most households below the top bracket. On a typical mid-level or senior vest, employer-side NY withholding over-collects and refunds at filing — the federal 22% default is where the under-withholding bites.

**Do I owe NYC city tax on RSUs that vest while I live in Manhattan?**
Yes. NYC residents owe an additional New York City personal income tax up to 3.876% on top of state tax. The EquityTax engine currently models the state side; for a full picture, plan for the extra city liability via a quarterly estimated payment or W-4 adjustment.

**When does New York's 10.9% top rate apply to my RSUs?**
The 10.9% rate applies to taxable income above $25,000,000 in a tax year. Almost no equity-comp earner sees it on a single vest, but if a one-time liquidity event (IPO, secondary, tender) pushes total NY-source income above that threshold, plan for the state-side gap with a quarterly estimated payment.

## Sources

- IRS Publication 525, *Taxable and Nontaxable Income* — RSU treatment, fair-market-value rules.
- IRS Publication 15, *Employer's Tax Guide* — federal supplemental withholding rate (22% / 37%).
- [New York State Department of Taxation and Finance](https://www.tax.ny.gov/pit/file/equity-compensation.htm) — state supplemental withholding rate (11.7%), brackets, and equity-comp guidance.
- EquityTax New York RSU Calculator (internal engine, last verified 2026-05-09).

<TaxDisclaimer />

*Estimate only — not financial or tax advice. Consult a qualified CPA before making decisions about exercising stock options, selling equity, or other financial moves.*