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The 50/30/20 Budget Rule
The 50/30/20 rule is one of the simplest budgeting frameworks. Popularized by Elizabeth Warren and Amelia Warren Tyagi in their 2005 book All Your Worth, it divides your after-tax income into three categories:
- 50% Needs: essentials you can’t avoid (rent, groceries, insurance, utilities, minimum debt payments)
- 30% Wants: non-essentials that improve quality of life (dining out, entertainment, hobbies, subscriptions)
- 20% Savings: financial goals (emergency fund, retirement, extra debt payments, investments)
How to Calculate Your Budget
Step 1: Determine Your Net Income
Start with your monthly take-home pay (after taxes and deductions):
| Note | Result |
|---|---|
| gross monthly = 5000 | 5,000 |
| federal tax = gross monthly × 12% | 600 |
| state tax = gross monthly × 5% | 250 |
| fica = gross monthly × 7.65% | 382.50 |
| gross monthly - federal tax - state tax - fica | 3,767.50 |
The right pane shows federal tax as 600, state tax as 250, fica as 382.50, and the net income as 3,767.50.
For help converting annual salary to monthly, see our salary calculator.
Step 2: Apply the 50/30/20 Split
To keep the numbers round, the next steps use a net income of $4,000/month rather than the $3,767.50 above. Swap in your own figure:
| Note | Result |
|---|---|
| net income = 4000 | 4,000 |
| net income × 50% | 2,000 |
| net income × 30% | 1,200 |
| net income × 20% | 800 |
The right pane shows 2,000 for needs, 1,200 for wants, and 800 for savings.
Step 3: Allocate Within Categories
Break each category into specific expenses:
Needs ($2,000):
| Note | Result |
|---|---|
| Rent: $1,200 | $1,200 |
| Groceries: $400 | $400 |
| Utilities: $150 | $150 |
| Insurance: $150 | $150 |
| Transport: $100 | $100 |
Wants ($1,200):
| Note | Result |
|---|---|
| Dining out: $300 | $300 |
| Entertainment: $200 | $200 |
| Subscriptions: $50 | $50 |
| Clothing: $150 | $150 |
| Personal care: $100 | $100 |
| Hobbies: $400 | $400 |
Savings ($800):
| Note | Result |
|---|---|
| Emergency fund: $400 | $400 |
| Retirement savings: $300 | $300 |
| Investing: $100 | $100 |
Budget by Income Level
| Net Income | Needs (50%) | Wants (30%) | Savings (20%) |
|---|---|---|---|
| $3,000 | $1,500 | $900 | $600 |
| $4,000 | $2,000 | $1,200 | $800 |
| $5,000 | $2,500 | $1,500 | $1,000 |
| $6,000 | $3,000 | $1,800 | $1,200 |
| $8,000 | $4,000 | $2,400 | $1,600 |
When to Adjust the Ratios
The 50/30/20 rule is a starting point, not a rigid formula:
- High cost-of-living area: You may need 60/20/20 or even 70/15/15
- Paying off debt aggressively: Try 50/20/30 (more to savings/debt)
- High income: Consider 40/20/40 to accelerate wealth building
- Low income: Focus on covering needs first, save what you can
Budgeting is not only personal. If you cost events for a living, our calculator for caterers and event planners applies the same idea to guest counts, cost per head, service charge and tax on one notepad.
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Calculate your monthly budget using the 50/30/20 rule (or customize the percentages).
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Example
Monthly net income of $5,500:
| Note | Result |
|---|---|
| net income = 5500 | 5,500 |
| net income × 50% | 2,750 |
| net income × 30% | 1,650 |
| net income × 20% | 1,100 |
The right pane shows 2,750 for needs, 1,650 for wants, and 1,100 for savings.
Frequently Asked Questions
What is the 50/30/20 budget rule?
The 50/30/20 rule splits your after-tax income into three categories: 50% for needs (rent, groceries, insurance), 30% for wants (entertainment, dining out, hobbies), and 20% for savings and debt repayment. It provides a simple framework for balanced spending without tracking every dollar.
How much should I save each month?
The 50/30/20 rule recommends saving 20% of your after-tax income. For someone earning $4,000/month after taxes, that’s $800. This includes emergency fund contributions, retirement savings, and extra debt payments. If you can save more, especially early in your career, you’ll benefit from compound interest.
What counts as a need vs a want?
Needs are expenses required for basic living: housing, groceries, utilities, insurance, minimum debt payments, and transportation to work. Wants are everything else that improves quality of life but isn’t essential: dining out, streaming subscriptions, vacations, and new clothes beyond basics. If in doubt, ask: “Could I survive without this?”
Build a Budget in Notes Calculator
Notes Calculator’s headings, variables, total keyword, and percentages make it a natural budgeting tool:
| Note | Result |
|---|---|
| income = $5,500 | $5,500 |
| ## Needs | |
| Rent: $1,400 | $1,400 |
| Groceries: $450 | $450 |
| Utilities: $180 | $180 |
| Insurance: $200 | $200 |
| Transport: $120 | $120 |
| total // sums the items above | $2,350 |
| ## Wants | |
| Dining out: $300 | $300 |
| Entertainment: $200 | $200 |
| Subscriptions: $60 | $60 |
| total | $560 |
| ## Savings | |
| Emergency fund: $500 | $500 |
| Retirement: $400 | $400 |
| Investing: $200 | $200 |
| total | $1,100 |
| // Check: does it balance? | |
| income - $1,400 - $450 - $180 - $200 - $120 - $300 - $200 - $60 - $500 - $400 - $200 | $1,490 |
Headings (#, ##) organize categories visually. The amounts are what you actually spend, so compare each section’s total with its 50/30/20 target, such as income × 50% for needs, to see where you are over or under. The total keyword sums consecutive numbers above it and acts as a subtotal for each section. Comments (//) annotate your reasoning. Change income and recalculate your entire budget instantly. With Lifetime, keep separate budgets for different months in separate notes. The docs explain total, average and previous in the totals and subtotals guide.
For understanding how your savings grow over time, see our compound interest calculator. If you’re budgeting restaurant spending, the tip calculator helps plan dining costs. For mortgage or loan payments in your needs category, use the loan payment calculator.
If rent or a mortgage is your biggest line, our calculator for landlords and homebuyers shows how to size a down payment and loan, add the full cost of owning, and check rental cash flow and gross yield.