How to use the 50/30/20 calculator
- Enter your after-tax income, per month or per year. Use take-home pay. If your employer deducts 401(k) contributions before paying you, add them back: under the rule they count toward your 20%.
- Choose an alternative split to compare. The calculator shows it next to 50/30/20 in the table.
- Enter what you actually spend on needs, wants and savings each month, if you want to check your budget against the targets. Leave all three empty to see the targets only.
Your three targets appear at once. With actual spending entered, the chart and table show each bucket against its target and how far over or under you are.
How the 50/30/20 split works
Wants = 0.30 × After-tax income
Savings & debt = 0.20 × After-tax incomeAfter-tax income is monthly take-home pay, or yearly take-home pay ÷ 12. Over or under target = Actual − Target for each bucket.
The rule was popularized by Elizabeth Warren and Amelia Warren Tyagi in their 2005 book All Your Worth. Its appeal is that it replaces dozens of budget categories with three, and puts a ceiling on fixed costs: if needs stay at or below half of take-home pay, a pay cut or a surprise bill can be absorbed by trimming wants instead of missing payments.
A worked example
With take-home pay of $5,000 a month, the rule allows $2,500 for needs, $1,500 for wants and $1,000 for savings and extra debt payments.
Actual spending in the example is $2,900 on needs, $1,350 on wants and $750 on savings. Needs take 58.0% of income, $400 over target. Wants at 27.0% are within their limit, but savings at 15.0% fall $250 short of 20%.
This is a familiar pattern: needs creep past half of income, and savings absorb the difference. Trimming wants by the shortfall, or moving the needs target to 60/20/20 while a housing cost comes down, are the two usual responses. On a yearly take-home pay of $84,000, the targets would be $3,500, $2,100 and $1,400 a month.
Needs, wants and savings: what goes where
Needs are the bills you must pay to live and work, and that would cause real harm if skipped:
- rent or mortgage, property tax, basic utilities
- groceries, health and car insurance, medical costs
- transportation to work, childcare
- minimum payments on credit cards and loans
Wants are everything you choose: restaurants and takeout, streaming and subscriptions, travel, hobbies, new clothes beyond the basics, and the upgrade part of a need (a premium phone plan, a newer car than you need).
Savings and debt is the 20% that builds your future: an emergency fund, retirement contributions, investing, saving for a home, and any debt payment above the minimum.
The minimum-versus-extra split for debt matters. A credit card minimum is a need. If you pay an extra $300 to clear the balance, that $300 belongs in the savings column, because it improves your net worth just as a deposit would.
Other splits
Fixed percentages do not suit every income or every city. The calculator compares 50/30/20 with the split you pick:
| Split | Needs | Wants | Savings & debt |
|---|---|---|---|
| 50/30/20 | $2,500 | $1,500 | $1,000 |
| 60/20/20 | $3,000 | $1,000 | $1,000 |
| 70/20/10 | $3,500 | $1,000 | $500 |
| 80/20 | $4,000 (needs and wants together) | — | $1,000 |
The 60/20/20 split keeps the savings share and takes the extra room for needs out of wants. The 70/20/10 split halves savings and is best treated as a short-term plan. The 80/20 rule drops the needs-and-wants distinction entirely: save 20% first, and spend the rest however you like.
What this calculator does not include
- Debt priorities. With high-interest credit card debt, many people put more than 20% toward it for a while.
- Your goals. Retiring early or buying a home soon may call for saving far more than 20%.
- Uneven income. If your pay varies, base the targets on a cautious monthly average.
- Taxes. The rule starts from take-home pay. If you only know your salary, the salary after tax calculator converts it first.
For a line-by-line budget, use the budget calculator.