# 50/30/20 Rule Calculator

URL: https://speedycalculator.com/calculators/finance/budget-50-30-20/
Last updated: 2026-10-25

> The 50/30/20 rule calculator splits your after-tax income into 50% for needs, 30% for wants and 20% for savings and debt repayment – and compares the targets with what you actually spend.

## Inputs

- After-tax income (per month, per year, per week, every two weeks)
- Needs share (%)
- Wants share (%)
- Your actual monthly needs
- Your actual monthly wants

## Results

- Needs (monthly)
- Wants (monthly)
- Savings and debt repayment (monthly)
- What's left to save with your actual spending
- Your actual savings rate
- Yearly savings target

## Formula

```
Needs = 50% × after-tax income
Wants = 30% × after-tax income
Savings and extra debt payments = 20% × after-tax income
```

## Explanation

The 50/30/20 budget was popularised by Senator Elizabeth Warren in "All Your Worth". It is a simple starting point: in high-cost cities needs may take more than 50%, so adjust the percentages if necessary.

### How to use the 50/30/20 Rule Calculator

- **After-tax income**
- **Needs share**
- **Wants share**
- **Your actual monthly needs**
- **Your actual monthly wants**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter your after-tax income (choose the period) and, optionally, what you actually spend on needs and wants.

### Tips

- Use your real spending from bank statements rather than guesses.
- Automate savings so they happen before you spend.
- Revisit your plan once a year or after any big life change.
- Keep an emergency fund before investing for long-term goals.

### Common mistakes to avoid

- Underestimating irregular expenses such as car repairs, gifts and annual bills.
- Ignoring inflation for long-term goals.
- Taking on high-interest debt to fund wants.

### Inputs explained

FieldWhat to enterAfter-tax incomeUnits: per month, per year, per week, every two weeksNeeds shareIn %Wants shareIn %Your actual monthly needsAmount in your currencyYour actual monthly wantsAmount in your currency

### What each result means

- **Needs (monthly)** = [After-tax income]×[Needs share]÷100
- **Wants (monthly)** = [After-tax income]×[Wants share]÷100
- **Savings and debt repayment (monthly)** = [After-tax income]×(100 - [Needs share] - [Wants share])÷100
- **What's left to save with your actual spending** = [After-tax income] - [Your actual monthly needs] - [Your actual monthly wants]
- **Your actual savings rate** = ([After-tax income] - [Your actual monthly needs] - [Your actual monthly wants])÷[After-tax income]×100
- **Yearly savings target** = [After-tax income]×(100 - [Needs share] - [Wants share])÷100×12

### Example values

How the main result changes when **After-tax income** changes and everything else stays at the example values above:

After-tax income (per month)Needs (monthly)2,2501,1253,3751,687.54,5002,2505,6252,812.56,7503,3759,0004,500

## Worked example

Inputs — After-tax income: $4,500 per month; Needs share: 50 %; Wants share: 30 %; Your actual monthly needs: $2,500; Your actual monthly wants: $1,100.

Results — **Needs (monthly) = $2,250.00**; Wants (monthly) = $1,350.00; Savings and debt repayment (monthly) = $900.00; What's left to save with your actual spending = $900.00; Your actual savings rate = 20 %; Yearly savings target = $10,800.00.

## FAQ

**What counts as needs?**
Housing, utilities, groceries, insurance, transport to work and minimum debt payments.

**What counts as wants?**
Eating out, entertainment, travel, hobbies and upgrades.

**Is the 50/30/20 rule based on gross or net income?**
Net (after-tax) income.

**What formula does the 50/30/20 Rule Calculator use?**
Needs = 50% × after-tax income.