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Head-to-head · Tax Calculators

Federal Income Tax Calculator by SmartAsset vs HMRC PAYE Tax Calculator

  • Updated Oct 2026
  • Both researched from official sources
  • 1 check side by side
Higher score Federal Income Tax Calculator by SmartAsset #1 in Tax Calculators 9.3/10 Free plan Free plan Visit SmartAsset
HMRC PAYE Tax Calculator #7 in Tax Calculators 8.3/10 Free plan Free plan Visit HMRC

Federal Income Tax Calculator by SmartAsset leads on 0 checks, HMRC PAYE Tax Calculator on 0, and 1 is even. Who comes out ahead on the 1 yes/no, price and count check where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreFederal Income Tax Calculator by SmartAsset · 9.3/10
  • Free planboth

Federal Income Tax Calculator by SmartAsset scores higher on our rubric for tax calculators: 9.3 against 8.3 out of 10; our editors rank them #1 and #7.

On tax jurisdictions, Federal Income Tax Calculator by SmartAsset gives you Multiple where HMRC PAYE Tax Calculator offers Federal.

Federal Income Tax Calculator by SmartAsset is the better fit for U.S. taxpayers comparing take-home pay and tax. HMRC PAYE Tax Calculator is the better fit for UK employers checking employee PAYE by pay period.

  • Federal Income Tax Calculator by SmartAsset fits best

    U.S. taxpayers comparing take-home pay and tax

  • HMRC PAYE Tax Calculator fits best

    UK employers checking employee PAYE by pay period

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. How we rank.

Side by side

Feature Federal Income Tax Calculator by SmartAsset 9.3/10 Visit ↗ HMRC PAYE Tax Calculator 8.3/10 Visit ↗
At a glance
Editor score 9.3 8.3
Ranking #1 in Tax Calculators #7 in Tax Calculators
Best for U.S. taxpayers comparing take-home pay and tax UK employers checking employee PAYE by pay period
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Support Email Docs
Built for Solo Small business, Mid-market, Enterprise
Specs
Calculator types Federal, FICA, state and local income tax; take-home pay PAYE employee Income Tax per pay period
Tax jurisdictions Multiple Federal
Income sources Household income; retirement account contributions and other pre-tax deductions Employee pay
Filing statuses Single; married filing jointly; married filing separately; head of household Not checked yet
Tax years 2025 2026 to 2027 (current tax year)
Platforms Web web
Our review
Pros
  • Estimates federal, FICA, state and local income taxes
  • Supports filing status, deduction, retirement and credit inputs
  • Shows marginal and effective tax rates alongside annual take-home pay
  • Calculates employee Income Tax for the current tax year
  • Supports weekly, fortnightly, four-weekly and monthly pay periods
  • Can account for previous-period gross pay and tax due
Cons
  • Provides estimates rather than tax-return filing
  • Results may differ from actual tax outcomes
  • Available on the web rather than as a listed native app
  • Focused on employee PAYE Income Tax, not annual tax estimates
  • Requires the employee’s tax code, payment date and gross pay
  • Previous-period gross pay and tax due may also be needed
Our verdict

SmartAsset’s Federal Income Tax Calculator is a free web tool for people estimating taxes and take-home pay. It accepts household income, location and filing status, with choices for single, married filing jointly, married filing…

Read the review →

HMRC PAYE Tax Calculator is a free web tool for employers checking an employee’s Income Tax for a pay period in the current tax year. It is aimed at UK payroll checks, using the employee’s tax code, payment date, pay frequency and pay…

Read the review →
  1. Federal Income Tax Calculator by SmartAssetTax Calculators 9.3Free plan
  2. HMRC PAYE Tax CalculatorTax Calculators 8.3Free plan

Strengths and trade-offs

  • Federal Income Tax Calculator by SmartAsset — where it wins

    • Estimates federal, FICA, state and local income taxes
    • Supports filing status, deduction, retirement and credit inputs
    • Shows marginal and effective tax rates alongside annual take-home pay

    Where it doesn't

    • Provides estimates rather than tax-return filing
    • Results may differ from actual tax outcomes
    • Available on the web rather than as a listed native app

  • HMRC PAYE Tax Calculator — where it wins

    • Calculates employee Income Tax for the current tax year
    • Supports weekly, fortnightly, four-weekly and monthly pay periods
    • Can account for previous-period gross pay and tax due

    Where it doesn't

    • Focused on employee PAYE Income Tax, not annual tax estimates
    • Requires the employee’s tax code, payment date and gross pay
    • Previous-period gross pay and tax due may also be needed
  • Federal Income Tax Calculator by SmartAsset9.3/10 · Free plan

    A free web calculator for comparing estimated taxes and take-home pay.

    Visit SmartAssetFull verdict →
  • HMRC PAYE Tax Calculator8.3/10 · Free plan

    A free web calculator for employers checking UK employee PAYE by pay period.

    Visit HMRCFull verdict →

More comparisons

All tax calculators comparisons → · Full ranking →

Guides on tax calculators

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update