Massachusetts 5% Flat Tax With $4,400 Personal Exemption: Why Your Effective MA Rate Is Never Actually 5% and Falls to 4.7% at $65,000
Massachusetts advertises a 5% flat income tax, but the $4,400 personal exemption for single filers ($8,800 married) means your effective state rate is always below 5%. The exemption does not phase out at higher incomes, it applies at every income level. A single filer at $65,000 pays tax only on $60,600, producing an effective rate of 4.66%. Compare this with Illinois, where the flat 4.95% rate applies to every dollar with no exemption.
MA State Tax = (Gross − $4,400 exemption) × 5%
$65,000 → taxable $60,600 × 5% = $3,030/yr
Effective rate: $3,030 / $65,000 = 4.66%
Annual Salary
MA Taxable Income
MA State Tax
Effective MA Rate
IL State Tax (4.95%)
MA Saves vs IL
$30,000
$25,600
$1,280
4.27%
$1,485
$205/yr
$50,000
$45,600
$2,280
4.56%
$2,475
$195/yr
$65,000
$60,600
$3,030
4.66%
$3,218
$188/yr
$85,000
$80,600
$4,030
4.74%
$4,208
$178/yr
$120,000
$115,600
$5,780
4.82%
$5,940
$160/yr
$150,000
$145,600
$7,280
4.85%
$7,425
$145/yr
MA tax applied to gross wages minus personal exemption. Illinois applies 4.95% to all gross wages with no exemption. The gap closes at higher incomes as the fixed exemption becomes a smaller fraction of gross pay. Use the Illinois Paycheck Calculator to run a direct side-by-side comparison for your specific salary.
Massachusetts 401(k) Non-Deductibility: Contributing 6% on $65,000 Saves $661 in Federal Tax But Zero in Massachusetts State Tax Every Year
Massachusetts is one of the few states that does not recognize traditional 401(k) contributions as a deduction from state taxable income. While the federal government reduces your taxable wages by the full 401(k) contribution, Massachusetts applies its 5% rate to your gross wages regardless of how much you contribute to retirement. At $65,000 with a 6% contribution, that means paying $195 in Massachusetts state tax on money you never received, tax that federal law explicitly defers.
The partial offset: Massachusetts exempts qualified 401(k) distributions in retirement from state income tax, since you already paid Massachusetts tax on that money going in. This is the opposite of the standard tax treatment and is unique to a small number of states. A worker in Virginia or Pennsylvania contributes to a 401(k) and saves both federal and state taxes upfront, Massachusetts earners save only the federal portion.
401(k) %
Annual Contribution
Federal Taxable Income
Federal Tax Saved
MA State Tax Saved
Total Annual Tax Savings
3%
$1,950
$48,450
$234
$0
$234
6%
$3,900
$46,500
$661
$0
$661
10%
$6,500
$43,900
$972
$0
$972
15%
$9,750
$40,650
$1,362
$0
$1,362
23% (max)
$14,950
$35,450
$2,001
$0
$2,001
Based on $65,000 single filer in 2025. Federal savings calculated using 2025 brackets (12% and 22% marginal rates). MA savings is $0 at all contribution levels because Massachusetts taxes gross wages before retirement deductions. 23% approximates the IRS $23,500 annual limit.
Five Massachusetts Paycheck Calculation Errors That Produce Wrong Take-Home Estimates
Assuming 401(k) contributions reduce your Massachusetts state tax
This is the most common error for Massachusetts workers. Contributing 10% of a $65,000 salary ($6,500) to a traditional 401(k) saves $972 in federal income tax but zero in Massachusetts state tax. The MA 5% applies to your full gross wages regardless of retirement contributions.
Applying the 5% rate to gross income without subtracting the personal exemption
Massachusetts taxes (gross - exemption), not gross income. A single filer at $65,000 pays tax on $60,600, not $65,000. Skipping the $4,400 exemption overstates your MA tax by $220 per year and makes your effective rate appear to be exactly 5% when it is actually 4.66%.
Entering monthly salary instead of annual gross
The salary field expects your full annual gross pay. If you earn $5,417 per month and enter that instead of $65,000, the result will be off by a factor of 12. Always multiply a monthly or bi-weekly figure up to annual before entering.
Forgetting that Massachusetts has no local income tax
Unlike Ohio (Columbus: 2.5%) or Maryland (county taxes of 2.25%–3.2%), Massachusetts prohibits cities and towns from levying a local income tax. What this calculator shows is the complete state income tax picture, there is no separate Boston or Worcester city tax to add.
Comparing the 5% MA rate directly to other states without accounting for the exemption
New Hampshire has no income tax on wages. Connecticut's lowest bracket is 2%. Illinois is 4.95% with no exemption. At $65,000, Massachusetts' effective rate of 4.66% is actually lower than Illinois' nominal 4.95%. Direct rate comparisons without running actual numbers mislead most job offer evaluations.
Frequently Asked Questions
Massachusetts has a flat income tax rate of 5% on wages, salaries, and most other income for 2025. In addition, Massachusetts voters passed the Fair Share Amendment (Question 1) in 2022, which adds a 4% surtax on annual income above $1,000,000. So high earners effectively pay 9% on income over $1 million.
Source for MA's 5% flat rate, personal exemption amounts ($4,400 single / $8,800 married / $6,800 HOH), and the 4% Fair Share Amendment surtax on income over $1 million.
Source for the $176,100 Social Security wage base and 6.2% employee FICA rate for 2025.
HR
Hassaan Rasheed
Developer and Researcher, CalculatorFlux
Researches and verifies the formulas, methodology, and source data behind each calculator on CalculatorFlux. All tools are built and checked against the cited references before publication.
Last updated: June 2026
Massachusetts Tax Rates 2025–26
Tax
Rate
MA State Income Tax
5% (flat)
MA Millionaire Surtax
+4% over $1M
Personal Exemption (single)
$4,400
Personal Exemption (married)
$8,800
Personal Exemption (HOH)
$6,800
Social Security
6.20%
Medicare
1.45%
SS Wage Base 2025
$176,100
401(k) Limit 2025
$23,500
Pro Tip
Massachusetts taxes 401(k) contributions going in, but qualified distributions come out tax-free at the state level. Over a 30-year career, contributing consistently means your MA retirement withdrawals are completely state-tax-free, a meaningful advantage over states that tax distributions.