50/30/20 Budget Calculator

A budget fails when it is too detailed to follow. The 50/30/20 rule offers the opposite: three buckets and three percentages. About half of your take-home pay goes to needs, thirty percent to wants and twenty percent to savings and extra debt repayment. The page turns your income into those three amounts, lets you change the percentages if the standard ones do not fit, and compares them with what you really spend.

Where the rule comes from

Elizabeth Warren and her daughter Amelia Warren Tyagi proposed the split in their 2005 book All Your Worth. Their point was a simple starting framework, not a rule of nature. Needs are what you must pay to live and work: housing, groceries, utilities, transport, insurance and minimum debt payments. Wants are everything else that you choose: dining out, subscriptions, travel and entertainment. Savings are money set aside or used to pay debt faster.

Setting up the numbers

Enter your monthly take-home income, the pay that reaches your account after tax and deductions. The three percentage fields start at 50, 30 and 20 and must total exactly 100; if they do not, the page tells you what they add up to instead. Change them to suit your situation: a person in a high-rent city might use 60/20/20, and a person with few fixed costs and ambitious goals might use 40/20/40.

A worked example

With an income of 60,000 the targets are 30,000 for needs, 18,000 for wants and 12,000 for savings, which is 1,44,000 saved over a year. In the second sample the actual figures are 34,000 on needs, 21,000 on wants and 5,000 saved. The table shows needs 4,000 over target, wants 3,000 over target and savings 7,000 below target, and a note confirms that the three amounts add up to the 60,000 income. The high-saver sample, 60/10/30, gives 36,000, 6,000 and 18,000 and a yearly saving of 2,16,000.

Reading the comparison

Look first at the savings line. Overspending on needs or wants shows up as a shortfall there, because the money has to come from somewhere. If your needs alone exceed their share, the place to look is housing and debts, which are the hardest to change; if wants are high, the cuts are easier. If your three actual amounts total more than your income, the page warns you that you are spending more than you earn, and if less, it points out the money that is unaccounted for.

Adapting the rule

The percentages are a conversation starter. Early in your career, when income is low, you may only reach 10 percent savings and that is a fine start. When you are close to retirement or paying off a high-interest debt, a larger savings share makes sense. What matters is that the three numbers are chosen on purpose and revisited when your income or costs change.

Limits

The page does not categorise your spending for you or read your bank statements; you decide what counts as a need. Income that varies, annual bills and irregular costs need averaging. Taxes are assumed to have been paid already, because the rule works on take-home pay.

Related tools

• Emergency Fund Calculator sizes the first thing the savings slice should build.
• Subscription Cost Calculator examines the wants slice, where recurring plans sit.
• Salary Calculator converts a pay offer into the monthly figure that goes in here.
• Net Worth Calculator shows the result of saving month after month.