401k and Taxes Explained
On This Page
A 401(k) is the most powerful tax-advantaged savings tool available to most American workers. Understanding how it interacts with your paycheck is essential.
Calculate Your Take-Home Pay
Enter your salary, state, and deductions — get your exact net pay in under 100ms.
Traditional 401(k): Reduce Taxes Now
Contributions to a traditional 401(k) are made before income taxes are applied. Your taxable income is reduced by the contribution amount. You defer taxes until retirement withdrawals.
Roth 401(k): Pay Taxes Now, Withdraw Tax-Free
Roth contributions come from after-tax dollars. There is no immediate tax break — but qualified withdrawals in retirement are 100% tax-free, including decades of investment growth.
2026 Contribution Limits
Tip
Traditional vs Roth decision tip: Choose traditional if you expect to be in a lower tax bracket in retirement. Choose Roth if you expect higher future taxes.
Frequently Asked Questions
Traditional 401k contributions reduce federal taxes in the contribution year. Roth contributions do not.
Calculate Your Take-Home Pay
Enter your salary, state, and deductions — get your exact net pay in under 100ms.
Related Articles
Tax Saving Tips
How To Increase Your Take Home Pay
5 legal ways to increase your take-home pay without a raise: 401(k) contributions, HSA, FSA, W-4 adjustments, and pre-tax benefits.
Read articleTax Saving Tips
Pre Tax vs Post Tax Deductions
Pre-tax deductions reduce your taxable income before taxes are applied, saving you money. Post-tax deductions come out after taxes.
Read articleTax Saving Tips
How To Reduce Taxable Income Legally
Legal strategies to reduce taxable income: retirement accounts, HSAs, itemized deductions, business deductions, and tax credits.
Read articleGet Salary & Tax Tips
Weekly insights on pay, taxes, and maximizing your take-home.