Budget Calculator (50/30/20 Rule)

Use the 50/30/20 budget calculator to allocate your income effectively based on needs, wants, and savings.

Income

How to use

Enter your monthly after-tax income. The calculator splits it into the 50/30/20 guideline so you can plan needs, wants, and savings targets.

Methodology

The 50/30/20 method allocates 50% of take-home income to needs, 30% to wants, and 20% to savings or debt payoff.

Full original guide (expanded)

Use the 50/30/20 budget calculator to allocate your income effectively based on needs, wants, and savings.

Formulas
  • Needs = Income × 0.50
  • Wants = Income × 0.30
  • Savings = Income × 0.20
Citations
Changelog
  • 0.1.0-draft — 2026-01-19 — Initial audit spec draft generated from HTML extraction (review required). Verify formulas match the calculator engine and convert any text-only formulas to LaTeX. Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido
Last Updated: 2026-01-19
Version 0.1.0-draft