Budget Percentage Planner
Split a budget by percentages across categories with overage warnings
About this calculator
The Budget Percentage Planner splits take-home income across categories by percent — like the classic 50/30/20 rule. Enter category names and percentages, optionally with a monthly income, and it computes each category's dollar amount, the total percent allocated, and what remains. If allocations exceed 100% it still shows the full breakdown but raises an overage warning so you can see exactly how far over you are.
How to use the Budget Percentage Planner calculator
- Enter your values into the input fields.
- Read the result — it updates instantly as you type.
- Adjust the inputs to compare scenarios.
- Copy the page URL to share the exact calculation.
Common examples
- 50/30/20 on $4,000: Needs $2,000, Wants $1,200, Savings $800 → 100.00% used, $0.00 left
- Rent 35% + Food 15% + Transport 10% on $5,200 → $3,120.00 allocated, 40.00% ($2,080.00) remaining
- 60% + 55% on $3,000 → 115.00% total, −15.00% remaining — overage warning
Frequently asked questions
How does the Budget Percentage Planner calculator work?
Enter your numbers and the calculator applies the standard formula for this everyday task, showing the result and how it was reached. It handles the unit and rounding details so you do not have to.
When would I use the Budget Percentage Planner calculator?
Whenever this comes up in daily life — planning, shopping, home projects, travel or work — and you want a quick, dependable answer instead of estimating or working it out by hand.
How accurate are the results?
The math runs at full precision internally and only the displayed value is rounded for readability. For real-world use the practical limit is the accuracy of the numbers you enter, not the calculation.
Can I share a specific calculation with someone else?
Yes. Every value you enter updates the URL, so copying the address bar and sharing the link reopens the exact same calculation for whoever clicks it.