50/30/20 Budget Calculator

The 50/30/20 rule is the fastest way to turn one number — your monthly take-home pay — into a working budget. Instead of tracking dozens of line items before you've even started, you split everything into three buckets: 50% for needs, 30% for wants, and 20% for savings and extra debt payoff. The calculator above does the arithmetic on your real paycheck so you can see, in dollars, what each bucket is actually allowed to be.

The most important word in that sentence is take-home. The rule is built on net pay — the money that lands in your account after taxes, health insurance, and retirement deductions come out. Budgeting off your gross salary is the single most common mistake, because it counts money you never get to spend and makes every bucket look bigger than it really is. If your employer already pulls retirement out before you see the check, that saving is happening — it just lives upstream of this split.

What goes in each bucket

The line between a need and a want is where most of the thinking happens, so be honest with yourself here:

• Needs (50%)are the things you genuinely can't skip without real consequences: rent or mortgage, utilities, basic groceries, insurance, transportation to work, and the minimumpayment on every debt. If missing it would cost you your home, your health, or your job, it's a need.
• Wants (30%)are everything that makes life better but isn't essential: dining out, streaming and subscriptions, hobbies, travel, the upgraded phone. These feel essential in the moment, which is exactly why they belong in their own capped bucket.
• Savings & debt (20%) is the bucket that builds your future: emergency fund, retirement beyond any payroll match, and — crucially — any paymentabove the minimums on your debt. Extra debt payoff lives here, not in needs.

When the split doesn't fit

If your needs blow past 50%, you're not doing it wrong — you probably live somewhere expensive, and the rule is a target, not a verdict. Use it as a diagnostic. A needs bucket at 65% is a signal to trim wants first, then to chip away at fixed costs over time: refinancing, a cheaper plan, a roommate, a shorter commute. The percentages tell you where the pressure is; they don't tell you you've failed.

That's also why the calculator lets you edit the three percentages. Some people run a 60/20/20 while they dig out of a high-cost stretch, or a 50/20/30 when they're pushing hard on savings. Adjust the numbers, watch the dollars move, and pick a split you can actually live on this month. Once you know your buckets, the next step is giving every dollar inside them a job — a zero-based budget — so the plan survives contact with a real month.