Money & tax

Estimators for the 2025–2028 US deductions (overtime, tips, seniors, car-loan interest, SALT), 2026 contribution limits and UK student loans. General information with IRS and GOV.UK sources, not financial advice.

• 2026 401(k) contribution limit calculatorFind employee deferral room, catch-up eligibility and the paycheck amount needed to reach your limit.
• Car loan interest deduction calculatorCheck eligibility, apply the income phase-out and optionally estimate yearly loan interest.
• Excess Social Security tax calculatorEstimate the credit from multiple employers and separate withholding errors an employer must correct.
• No tax on overtime calculatorEstimate the qualified overtime deduction, income phase-out and optional federal tax savings.
• No tax on tips calculatorEstimate your tips deduction after business net-income limits, the return cap and income phase-out.
• SALT cap calculatorFind your income-adjusted SALT cap, allowed itemized deduction and taxes excluded by the cap.
• 2026 senior deduction calculatorEstimate the enhanced senior deduction and the separate 2026 age-based standard deduction addition.
• Trump account contribution room calculatorCheck 2026–2027 contribution room by source and illustrate growth at a return you choose.
• UK student loan repayment calculatorEstimate 2026/27 payroll deductions for Plans 1, 2, 4, 5 and postgraduate loans.