Free Finance, Tax & Employment Calculators

Free, accurate calculators for taxes, severance and freelance income. No sign-up, no spreadsheets — just enter your details and get clear, explained results you can save as an image.

Tax Penalty Calculators

Estimate IRS underpayment and late-payment penalties and interest.

IRS Underpayment Penalty Calculator Estimate the Form 2210 penalty for underpaying estimated tax, including safe-harbor checks.
Late Tax Payment Penalty Calculator Estimate IRS failure-to-file, failure-to-pay penalties and interest on a late tax balance.

Severance & Redundancy Calculators

Estimate severance pay and statutory redundancy across the US, UK and Canada.

Severance Pay Calculator (US) Estimate a US severance lump sum and take-home pay from salary, tenure and policy.
UK Redundancy Pay Calculator Calculate UK statutory redundancy pay using the age bands, 20-year limit and weekly cap.
Severance Pay Calculator (Canada) Estimate Ontario ESA termination + severance pay and your common-law notice range.

Freelance & Business Calculators

Price your work and plan your income as a freelancer or contractor.

Freelance Hourly Rate Calculator Turn an income goal into the hourly and day rate you need as a freelancer or contractor.