50/30/20 Budget Calculator
Split your monthly take-home pay with the 50/30/20 rule: 50% for needs, 30% for wants and 20% for savings and debt repayment.
50/30/20 Target Allocation
Frameworks are scaffolding, not rules
A budget allocates income before it is spent rather than explaining afterwards where it went. The best-known framework is 50/30/20 — half of take-home pay to needs, 30% to wants, 20% to savings and debt repayment. Its value is that it gives you a starting shape to argue with, and a quick read on whether the problem is income or allocation.
It breaks in predictable places. In an expensive housing market, needs alone routinely exceed 50%, and the honest response is to adjust the ratios rather than reclassify rent as a want. The needs/wants boundary is also fuzzier than it looks: a car is a need where public transport does not exist and a want where it does. Treat the framework as scaffolding you adapt, not a standard you are failing to meet.
Two mechanics matter more than the ratios. Budget from net pay, not gross — gross includes money you will never see. And plan for irregular costs, which is where most budgets actually fail: annual insurance, car repairs, replacing a boiler. Dividing predictable-but-infrequent expenses by twelve and setting that aside monthly turns the emergencies that wreck a budget into line items that do not.
Frequently asked questions
Who created the 50/30/20 rule?
Elizabeth Warren and Amelia Warren Tyagi popularized it in their 2005 book All Your Worth: The Ultimate Lifetime Money Plan. Their version is based on after-tax income, which is why this calculator asks for monthly take-home pay rather than salary before tax.
What is the 50/30/20 budget rule?
Allocate 50% of after-tax income to needs, 30% to wants and 20% to savings and debt repayment. It is a starting framework rather than a prescription - in high-cost housing markets the needs share is often unavoidably higher, in which case the wants category absorbs the difference.
How much should I keep in an emergency fund?
Three to six months of essential expenses is the common guidance, weighted toward six or more if your income is variable, you are self-employed, or you are a single earner. Keep it somewhere liquid and separate from day-to-day spending - a high-yield savings account rather than investments that could be down when you need them.
Should I pay off debt or save first?
Build a small starter emergency fund - often one month - so that a surprise does not put you straight back into debt, then attack high-interest debt aggressively, since paying off 22% credit card interest is a guaranteed 22% return. Below roughly 6-8% interest, the choice between repaying and investing becomes genuinely finely balanced.