Zero-Based Paycheck Budget Calculator
Start with one take-home paycheck and give each part of it a job, in dollars or as a percent of pay. The calculator keeps a running Left to assign total and shows when every dollar has a place.
How to use it
A zero-based budget gives every dollar of income a job before you spend it. "Zero" doesn't mean zero in the bank; it means income minus everything you've planned equals $0, because savings and debt payments count as jobs too. This tool does that for one paycheck at a time.
1. Enter your take-home pay
Type the amount that lands in your account for this paycheck, after taxes and any deductions.
2. Add a line for each place the money goes
For each line:
- Where it goes: a name, such as Rent, Groceries or Savings.
- Amount: a dollar amount, or a percent of this paycheck.
- $ or %: pick $ for a fixed amount or % of pay for a percent. Percent lines are turned into dollars and rounded to the cent, and the Dollars column shows the result.
- Type: Need, Want or Savings & debt.
Use + Add a line for more rows and × to remove one.
3. Work Left to assign down to $0
Above the summary you'll see:
- Assigned: the total of every line, in dollars.
- Left to assign: take-home pay minus assigned.
- Status: "Left to assign" while money is still unplanned, "Over assigned" if the lines add up to more than the paycheck, or "Every dollar assigned" at exactly $0.
If money is left over, you can add it to an existing line or give it a new one. If you're over, you can trim a line until the status reads "Every dollar assigned".
4. Compare with the 50/30/20 guide
The Needs, wants and savings table adds up your lines by type and shows each total in dollars and as a percent of pay. Next to it is a 50/30/20 split of the same paycheck: 50% to needs, 30% to wants and 20% to savings and debt. It's a common rule of thumb, shown for comparison. It isn't a target you have to hit, and plenty of budgets look different from it for good reasons.
Choosing types
The Need, Want and Savings & debt labels only affect the comparison table, not Left to assign. Put a line where it makes sense to you. Many people count rent, groceries, utilities, transportation and minimum debt payments as needs, and eating out, hobbies and subscriptions as wants. Extra debt payments and sinking funds fit under Savings & debt.
Keep in mind
The tool plans one paycheck. It doesn't schedule bills by due date or split a monthly bill across several paychecks, so if you're paid more than once a month, enter the share of each bill that this paycheck covers. Results are a plan from the numbers you type, not a forecast of what you'll actually spend.
Worked example
These are the numbers loaded by Try an example, for a $2,150 take-home paycheck:
- Needs: rent (half) $725, groceries $240, utilities and phone $160, gas and transit $90
- Savings & debt: debt payment $175, savings 10% of pay (= $215.00), sinking funds $290
- Wants: eating out $120, fun money $100, subscriptions $35
Results:
- Assigned: $2,150.00. Left to assign: $0.00. Status: Every dollar assigned
- Needs: $1,215.00 (57% of pay) vs the 50/30/20 guide's $1,075.00
- Wants: $255.00 (12% of pay) vs $645.00
- Savings & debt: $680.00 (32% of pay) vs $430.00
The 10% savings line becomes $215.00 because 10% of $2,150 is $215. In this plan, needs and savings take a bigger share than the guide and wants take less, which the comparison table makes easy to see.
FAQ
Does zero-based mean I spend everything?
No. Savings and debt payments are lines in the plan, so reaching $0 left to assign just means every dollar has a job, including the ones you're keeping.
Should I use gross or take-home pay?
The calculator is built around take-home pay, the amount that actually reaches your account, since that's what the lines are paid from.
What's the 50/30/20 guide?
A simple split often used as a reference: half of take-home pay to needs, 30% to wants and 20% to savings and debt. The table shows it next to your plan for comparison only.
How are percent lines worked out?
Each percent line is that percent of this paycheck, rounded to the cent. Change the paycheck and those lines update with it.
Is my budget saved?
No. Nothing you type is stored by the site or sent anywhere; the calculator runs in your browser and clears the form each time the page loads.