Which state has the highest income tax rate in 2025?
California. The highest marginal rate is 13.3% for tax year 2025. This percentage covers a 1% surcharge on taxable income over $1 million.
What does “highest income tax rate” mean?
The top percentage amount in a state's tax schedule. 3 points would clarify it better:
- Such a rate applies only to the top bracket — not the average household bill
- That highest rate is applicable only after crossing an income threshold
- The effective rate generally stays lower since deductions & credits change the calculation
Which states have the highest top state income tax rates in 2025?
The top 4 by highest bracket are presented below.
These percentages mirror the highest statewide rates for 2025.
Does NYC change the answer?
NYC extends taxation with a local income tax for full-year residents. The city top rate touches 3.876% in 2025. This makes the combined state & city total higher than a state-only comparison shows.
What should you watch for?
Watch for income linked with multiple locations. Withholding & filing processes tend to evolve into complications. We can exemplify the triggers as below:
- Living in one state — but earning wages in another
- Working from distinct states under remote conditions
- Large bonuses & RSUs or contractor payments in a single year
- Part-year residency following a move requires 2 state returns
States generally present a credit approach to lower double taxation — but the outcome varies with residency information & source income as well as timing.
How can you estimate the state income tax?
A rough number can be located by taking 5 actions as listed below:
- The state taxable income is the initial point — not gross pay
- Find the filing status in the state bracket table
- The specific rate should be applied to the income chunk in that range
- Applicable local income tax should be added — NYC is a prime example
- Take off credits at the end
Dimov NYC CPA presents professional support
Our professional team reviews the withholding & estimated payments to locate residency or part-year issues. You get a direct roadmap for the tax return.