Monthly Budget Calculator
Last updated: 2026-06-25
The budget calculator automatically splits your after-tax monthly income with the 50/30/20 rule into needs, wants, and savings to plan a monthly budget.
The formula is category budget = monthly income × (category % ÷ 100), and you can adjust the percentages.
Enter Your Budget
Needs budget (monthly)
$0
| Category | Percent | Monthly budget |
|---|---|---|
| Needs | ||
| Wants | ||
| Savings & debt | ||
| Allocated total |
50/30/20 is a recommended starting point, not an absolute rule. Adjust the percentages if your rent is high or your savings goal is large. Results are estimates for reference.
How to Use
- Enter monthly income - enter your after-tax monthly take-home income.
- Set the split - use the default 50/30/20 rule or adjust the needs, wants, and savings percentages yourself.
- View the budget - press Calculate to see each category's monthly budget and the totals in a table.
Understanding the 50/30/20 Budget Rule
The 50/30/20 rule is a simple, balanced household budgeting principle that divides after-tax income into three buckets. Because it quickly decides "how much you can spend on what" without a complex spreadsheet, it is especially useful for anyone budgeting for the first time. The categories are defined as follows.
| Category | Default % | Example spending |
|---|---|---|
| Needs | 50% | Rent/mortgage, food, transport, phone, utilities, insurance |
| Wants | 30% | Dining out, shopping, hobbies, travel, leisure subscriptions |
| Savings | 20% | Emergency fund, savings/investing, loan principal repayment |
For example, with an after-tax monthly income of $4,000 the split is $2,000 for needs, $1,200 for wants, and $800 for savings. If high rent pushes needs above 50%, trim the wants percentage to rebalance while protecting the 20% savings as much as possible. If you carry a lot of debt, you can raise the savings & debt bucket to pay it down first.
If subscriptions are squeezing your wants budget, check the total first with the subscription cost calculator, and use the savings goal calculator to set a concrete savings target. For more detailed strategy, see the Complete Subscription & Budget Guide.
Frequently Asked Questions (FAQ)
What is the 50/30/20 budget rule?
It is a household budgeting principle that allocates 50% of after-tax income to needs such as housing, food, and utilities, 30% to wants such as dining out, hobbies, and subscriptions, and 20% to savings and debt repayment. It is widely used as a simple, balanced starting point.
Do I have to use exactly 50/30/20?
No. 50/30/20 is only a starting point; you can adjust the percentages if you live in a high-rent area or have a large savings goal. This calculator lets you change all three percentages freely and shows a note if they do not add up to 100%.
Should I enter gross or net income?
Because a budget should be based on money you can actually spend, enter your after-tax take-home pay. Using a gross figure sets a budget larger than reality and can lead to a shortfall.
Which category do subscriptions go in?
Leisure subscriptions like Netflix or music usually go under wants (30%), while essential subscriptions like your phone plan or required cloud storage go under needs (50%). Add up your subscriptions first with the subscription cost calculator, then compare them to that category's budget.
Related Calculators & Guides
Subscription Cost Calculator
Add up scattered subscriptions for a monthly and yearly cost.
Savings Goal Calculator
Find the monthly amount to save from a target and time frame.
Complete Subscription & Budget Guide
A guide to sticking to a budget and cutting wasted spend.
About
See Subscription Tracker's principles and calculation standards.
Last updated: 2026-06-25