Annual Calculator

Massachusetts Bonus Tax Calculator 2025: Calculate Taxes

Accurately estimate taxes on your Massachusetts bonus income for 2025

Input Your Information

Percentage Method: Flat 22% federal withholding (default)

Tax Breakdown

Gross Bonus Amount: $0.00
Federal Withholding: $0.00
Federal Withholding Rate: 22.00%
Massachusetts State Tax: $0.00
MA State Tax Rate: 5.00%
Social Security Tax: $0.00
Medicare Tax: $0.00
Total Tax: $0.00
Effective Tax Rate: 0.00%
Your Net Bonus After Taxes
$0.00

How to Use This Calculator

1

Enter Your Bonus Amount

Input the gross amount of your bonus before any taxes or deductions.

2

Enter Your Annual Salary

Provide your current annual salary to determine your tax bracket accurately.

3

Select Filing Status

Choose your tax filing status from the dropdown menu.

4

Choose Withholding Method

Select between the Percentage Method or Aggregate Method for federal withholding.

5

Review Your Results

See the breakdown of federal taxes, Massachusetts state taxes, FICA taxes, and your net bonus amount.

Official Massachusetts Department of Revenue Tax Information

Visit the Massachusetts DOR website for official tax information

How Are Bonuses Taxed in Massachusetts in 2025?

Bonuses in Massachusetts face both federal and state taxes, but the methods differ. The IRS treats bonuses as supplemental income, while Massachusetts uses the aggregate method. This section explains the basics.

Federal Tax on Bonuses

The IRS applies a flat rate to supplemental income:

  • 22% for bonuses up to $1 million.
  • 37% for amounts exceeding $1 million.
  • Social Security (6.2%) and Medicare (1.45%) also apply, with thresholds adjusting for 2025.

Massachusetts State Tax on Bonuses

Massachusetts uses the aggregate method:

  • Combines your bonus with annual income.
  • Taxes the total at a flat 5% rate.
  • Adds a 4% surtax if total income exceeds $1,053,750 (adjusted for inflation from 2023’s $1 million).

Example: A $5,000 bonus with a $60,000 salary totals $65,000. The state tax on $65,000 is $3,250 (5%), but you subtract the tax on $60,000 ($3,000), leaving $250 as the bonus tax.

What Are the 2025 Massachusetts Tax Rates?

Tax rates for 2025 reflect current laws and projected adjustments. Here’s the latest breakdown based on data as of March 7, 2025.

State Tax Rates

  • Flat Rate: 5% on all income.
  • Millionaires Tax: Additional 4% on income over $1,053,750.
  • Source: Massachusetts Department of Revenue, assuming no legislative changes from 2024.

Federal Tax Rates for Bonuses

  • Supplemental Rate: 22% up to $1 million, 37% above.
  • Social Security: 6.2% on income up to $176,100 (projected 2025 wage base).
  • Medicare: 1.45%, plus 0.9% if income exceeds $200,000 (Single) or $250,000 (Married Filing Jointly).

Statistic: In 2023, 9% of Massachusetts taxpayers paid the surtax, a trend likely to hold in 2025 as incomes rise with inflation.

How to Calculate Your Massachusetts Bonus Tax for 2025

Calculating your bonus tax involves a step-by-step process. This section provides a clear method.

Step-by-Step Calculation

  1. Determine Gross Bonus: Start with your bonus amount (e.g., $10,000).
  2. Add Annual Income: Combine with your yearly salary (e.g., $80,000 = $90,000 total).
  3. Apply State Tax: Multiply total income by 5% ($90,000 × 0.05 = $4,500). Subtract tax on salary alone ($80,000 × 0.05 = $4,000). Bonus state tax = $500.
  4. Federal Tax: Multiply bonus by 22% ($10,000 × 0.22 = $2,200).
  5. Social Security: If under $176,100, apply 6.2% ($10,000 × 0.062 = $620).
  6. Medicare: Apply 1.45% ($10,000 × 0.0145 = $145).
  7. Net Bonus: Subtract all taxes from gross ($10,000 – $500 – $2,200 – $620 – $145 = $6,535).

Quick Reference Table:

ComponentRateExample ($10,000 Bonus)
State Tax5%$500
Federal Tax22%$2,200
Social Security6.2%$620
Medicare1.45%$145
Net Bonus$6,535

Factors That Affect Your Bonus Tax in 2025

Several variables can adjust your tax liability. Understanding these ensures accuracy.

Income Thresholds

  • High earners crossing $1,053,750 face the 9% state rate.
  • Federal Medicare surtax kicks in above $200,000 (Single).

Filing Status

  • Single filers hit Medicare surtax at $200,000, while joint filers get $250,000.
  • Impacts total tax on combined income.

Year-to-Date Earnings

  • Social Security stops at $176,100. If prior wages exceed this, no additional 6.2% applies to the bonus.

Case Study: Jane, a single filer with $190,000 annual income, gets a $20,000 bonus. Her total ($210,000) triggers the 0.9% Medicare surtax ($180 extra), increasing her tax burden.

Massachusetts Bonus Tax 2025 FAQs

How are bonuses taxed in Massachusetts in 2025?

Bonuses in Massachusetts are subject to both federal and state taxes in 2025. The federal government taxes bonuses as supplemental income at a flat 22% rate for amounts under $1 million. Massachusetts applies its 5% flat tax rate to bonuses using the aggregate method, which combines your bonus with regular income. Additionally, Massachusetts imposes a 4% surtax on income exceeding $1,083,150. Your bonus will also face Social Security tax (6.2% up to $176,100) and Medicare tax (1.45%).

What is the Massachusetts bonus tax rate for 2025?

The Massachusetts bonus tax rate for 2025 is 5% for most taxpayers. Massachusetts uses a flat tax system that applies the same rate to all income types including bonuses. High-income earners face an additional 4% surtax on income exceeding $1,083,150 in 2025. The state uses the aggregate method for calculating bonus taxes, which means your bonus gets combined with your regular income before tax is calculated. Federal taxes are separate and include a 22% flat rate on bonuses under $1 million.

Do I have to pay additional tax on bonuses over $1 million in Massachusetts?

Yes, bonuses over $1 million face additional taxes in Massachusetts in 2025. The federal government applies a higher 37% withholding rate on bonus amounts exceeding $1 million. Massachusetts imposes its standard 5% flat tax on the entire bonus amount. Additionally, Massachusetts has a 4% surtax on total taxable income exceeding $1,083,150 in 2025. This means high-value bonuses could trigger both the federal higher rate and the Massachusetts millionaire surtax.

How is federal tax calculated on bonuses in Massachusetts?

Federal tax on bonuses in Massachusetts follows the IRS supplemental wage rules for 2025. Employers typically use the flat rate method, withholding 22% for federal income tax on bonuses up to $1 million. For amounts exceeding $1 million, the withholding rate jumps to 37% on the portion above $1 million. These federal withholding rates apply regardless of your tax bracket. Additional withholdings include Social Security tax (6.2% up to $176,100) and Medicare tax (1.45% on all wages).

What is the Massachusetts millionaire tax and how does it affect bonuses?

The Massachusetts millionaire tax is a 4% surtax on income exceeding $1,083,150 for 2025. This surtax applies to total taxable income, including wages, bonuses, investment income, and other earnings. If your annual income plus bonus pushes you over this threshold, the amount above $1,083,150 faces an effective tax rate of 9% in Massachusetts (5% base rate plus 4% surtax). The surtax is calculated by adding all your Part A, B, and C income to determine if you exceed the threshold. Large bonuses can potentially trigger this higher tax rate.

What's the difference between federal and Massachusetts state bonus tax?

The main difference between federal and Massachusetts bonus taxation is in their methods and rates for 2025. Federally, bonuses are typically withheld at a flat 22% rate (37% for portions exceeding $1 million). Massachusetts applies its 5% flat tax using the aggregate method, combining your bonus with regular income. Federal taxation includes graduated tax brackets when you file your return, while Massachusetts maintains its flat 5% rate. Massachusetts also adds a 4% surtax on income over $1,083,150, which the federal system doesn't have.

How much will be withheld from my bonus in Massachusetts in 2025?

Withholding from bonuses in Massachusetts for 2025 includes multiple tax components. Federal withholding is typically 22% for bonuses under $1 million. Massachusetts state withholding is 5% on the bonus amount, plus potentially an additional 4% if your total income exceeds $1,083,150. Your employer will also withhold 6.2% for Social Security (up to the $176,100 annual wage cap) and 1.45% for Medicare. Together, these withholdings can total approximately 34.65% or more of your bonus amount.

If I receive a $10,000 bonus in Massachusetts, how much tax will I pay?

On a $10,000 bonus in Massachusetts in 2025, you'll pay approximately $3,265 in combined taxes. Federal income tax withholding will be around $2,200 (22% flat rate). Massachusetts state tax will be $500 (5% flat rate). Social Security tax will claim $620 (6.2%), and Medicare will take $145 (1.45%). These amounts represent withholding at the time of payment. Your actual final tax liability could differ when you file your annual returns based on your total income and deductions.

Do employers in Massachusetts have to use the aggregate method for bonuses?

Massachusetts employers can choose between different methods for bonus tax withholding in 2025. For federal withholding, employers typically use the 22% flat rate method for simplicity. For Massachusetts state withholding, employers commonly use the aggregate method, which combines your bonus with regular wages to determine withholding. The state's Circular M provides detailed guidance for calculating withholding on supplemental wage payments. Employers must ensure proper withholding of the 4% surtax on income above $1,083,150 for 2025.

Can I reduce the tax on my bonus in Massachusetts?

You can potentially reduce taxes on your Massachusetts bonus through several strategies. Contributing to tax-advantaged accounts like 401(k)s or HSAs directly from your bonus can lower your taxable income. Timing your bonus receipt between tax years might help if you expect lower income in one year. Requesting your employer use the aggregate withholding method could result in lower withholding if your regular income is taxed at a lower effective rate. Consulting with a tax professional can help identify specific strategies based on your financial situation.

Are year-end bonuses taxed differently in Massachusetts?

Year-end bonuses are not taxed differently from other bonuses in Massachusetts for 2025. All bonuses face the same 5% Massachusetts flat tax rate regardless of when they're paid during the year. Federal withholding remains at 22% for amounts under $1 million. The timing of a year-end bonus can impact which tax year it belongs to, potentially affecting your total annual income. If your bonus pushes your income over $1,083,150, the excess amount will trigger the additional 4% Massachusetts surtax.

Do I need to file a separate tax return for bonus income in Massachusetts?

No, you don't need to file a separate tax return for bonus income in Massachusetts. Bonuses are reported on your standard W-2 form in Box 1 along with your regular wages. You'll include this combined amount on your regular Massachusetts state tax return and federal income tax return. Your employer should properly withhold taxes from your bonus when it's paid. The bonus may affect your total tax liability when you file, but it doesn't require separate filing or special forms.

How do stock bonuses get taxed in Massachusetts in 2025?

Stock bonuses in Massachusetts face taxation based on their fair market value when vested or exercised in 2025. For restricted stock units (RSUs), you pay Massachusetts' 5% tax on the value when they vest. Stock options are taxed when exercised, with the difference between exercise price and market value considered taxable income. Massachusetts also applies its 4% surtax if your total income exceeds $1,083,150. Special consideration is needed for capital gains taxes when you eventually sell the shares.

Are holiday bonuses taxed the same as performance bonuses in Massachusetts?

Yes, holiday bonuses and performance bonuses are taxed identically in Massachusetts in 2025. Both types face the same 5% Massachusetts flat tax rate and 22% federal withholding rate (for amounts under $1 million). The purpose or timing of the bonus doesn't affect its tax treatment under state or federal law. All bonus types are considered supplemental wages for tax purposes. Both holiday and performance bonuses are subject to Social Security, Medicare, and potentially the 4% Massachusetts surtax if your total income exceeds $1,083,150.

What payroll taxes apply to bonuses in Massachusetts for 2025?

Payroll taxes on Massachusetts bonuses in 2025 include multiple components. You'll pay 6.2% Social Security tax on bonus amounts up to the annual wage base of $176,100. Medicare tax takes 1.45% of your entire bonus regardless of amount. High-income earners pay an additional 0.9% Medicare tax on income above $200,000 (single) or $250,000 (married filing jointly). Massachusetts also requires employers to withhold for state unemployment and family/medical leave insurance. These payroll taxes are in addition to federal and state income taxes.

How does Massachusetts tax bonuses compared to neighboring states?

Massachusetts taxes bonuses differently than its neighboring states in 2025. Massachusetts applies a flat 5% tax rate plus a 4% surtax on income over $1,083,150. Connecticut uses progressive tax brackets ranging from 3% to 6.99%. Rhode Island has three brackets from 3.75% to 5.99%. New Hampshire doesn't tax wages or bonuses at all. Vermont uses progressive rates from 3.35% to 8.75%. Massachusetts simplifies calculations with its flat rate but potentially taxes high-income earners more heavily with its surtax system.

Will the 2025 Massachusetts tax amnesty program apply to underpaid taxes on bonuses?

The Massachusetts tax amnesty program (Nov 1 - Dec 30, 2024) may cover underpaid bonus taxes. Eligible taxpayers with unfiled returns or underreported taxes can reduce penalties by participating. To qualify, file and pay all returns, taxes, and interest by December 30, 2024. The amnesty includes income taxes, which apply to bonuses. Note the deadline is before the end of the 2024 calendar year.
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About Annual Calculator

Annual Calculator was founded in 2018 by Akash Biswas, CFA, creating a trusted platform for precise financial calculations. With over 12 years of expertise in financial analysis, taxation systems, and regulatory compliance, we've developed industry-leading tools that have revolutionized how people manage their finances.

Our mission is to democratize financial mathematics, ensuring users get accurate, transparent, and customizable solutions. Over 820,000 calculations are performed monthly on our platform, with a verified 99.8% accuracy rate compared to professional accounting services.

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Akash Biswas, CFA Founder & CEO

Former Senior Financial Analyst at Goldman Sachs with an MBA in Finance from Wharton. Recognized in Forbes "30 Under 30" for financial technology innovation. Member of the International Association of Financial Planning.

CFA Certified MBA Finance Tax Specialist

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Rajiv Mehta, MS Lead Developer

Former Google engineer with 8+ years specializing in fintech applications. Expert in data security and algorithm optimization. Reduced calculation time by 75% while improving accuracy to 99.8%.

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Priya Sharma, CPA Finance Director

Former tax consultant at Deloitte with expertise in international tax law and payroll systems. Ensures all calculator algorithms comply with latest regulatory changes across multiple jurisdictions.

CPA Certified Tax Law Specialist

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