Take $5,200 of monthly pay after tax and $4,500 of spending, and $700 is left at month end. Type your own income and costs below and find out if your plan balances or comes up short.
How does your money split into needs, wants and savings?
Besides the leftover amount, the calculator sorts your spending into three shares. Needs are housing, utilities and phone, groceries, transport, insurance and debt payments. Wants are fun and dining out. Savings gets its own line. The table sets the default plan next to the common guide.
| Share | Default plan | Common guide |
|---|---|---|
| Needs | 68% of income | 50% |
| Wants | 9% of income | 30% |
| Savings | 10% of income | 20%, together with debt |
One catch. The guide puts debt with savings, while the calculator counts debt payments as a need, so your needs figure will look higher than the guide’s. That is only a difference in bookkeeping.
What does the default plan look like?
It’s $2,000 for rent or a mortgage, $250 for utilities and phone, $550 for groceries, $300 for transport, $150 for insurance, $300 for debt payments, $450 for fun and $500 for savings. That adds up to $4,500. Needs come to $3,550, or 68% of income, and $700 is left.
Now push housing up to $3,200. Spending climbs to $5,700 and you’re $500 short, with needs at 91% of income. A warning tells you spending is higher than income. Look first at the biggest line, which is nearly always housing, and only then at flexible lines like fun and dining out.
The other direction helps too. Raise savings to $1,000 and cut fun to zero, and spending is $4,550, so $650 is left. The savings share rises from 10% to 19% of income.
What if you’re short every month?
Don’t start with the coffee. In the $3,200 housing example, even cutting fun to zero only saves $450, and you’d still be $50 short. The gap lives in the big lines, so look at them in this order: housing, transport, debt payments, then groceries. Trimming one big bill often frees up more than skipping small treats ever will. If nothing moves enough, the fix is on the income side, and the take-home pay calculator below shows what a raise or extra shifts would really add after tax.
Where do budgets go wrong?
Yearly costs. Insurance renewals, gifts, car repairs and travel all come around once a year and wreck a monthly plan that ignored them. Divide each by 12 and add the result to a monthly line. A $1,200 insurance renewal is $100 a month, and $600 of gifts is another $50. The other slip is using gross pay instead of take-home pay, which makes every share look smaller than it really is.
The calculator has eight fixed lines and no category for childcare, medical costs or subscriptions, so put those in the closest line. It also covers one month only and doesn’t track what you actually spend. Give it a month, compare your plan with your bank statements, then adjust the numbers to match real life. The Financial Consumer Agency of Canada’s guide to making a budget also suggests tracking your spending for a month or two before you build one.
Does 50/30/20 fit where you live?
Often it doesn’t, and that’s okay. In a pricey city, rent alone can eat half a paycheque, so a plan with needs at 68% may be the honest one. Treat the guide as a starting point to argue with. What counts is that the amount left over isn’t negative.
Which calculators help after you build a budget?
Not sure what lands in your account after tax? The take-home pay calculator works it out from your salary. To see how savings and debts add up over time, try the net worth calculator. And if the budget shows a card balance you can’t ignore, the credit card payoff calculator turns it into a repayment plan.
Where does the math come from?
Nothing outside your inputs is used. The calculator adds your eight spending lines, subtracts the total from your income, and divides groups of lines by income to get the shares. The 50/30/20 guide is a rule of thumb, not an official standard. This is an independent guide, separate from any government body.
About this calculator
- What it does
- Plan a monthly budget and see what is left over.
- Category
- Savings, Interest and Budget
- Last checked
- September 30, 2026
- Result type
- Estimate for information only, not tax advice.
Frequently asked questions
What income should I enter in the budget calculator?
Enter your monthly pay after tax and deductions, the amount that lands in your bank account. Gross pay makes every share look smaller than it really is. If your pay varies from month to month, use a low average month to stay on the safe side.
What is the 50/30/20 rule?
It is a common guide that puts 50% of income toward needs, 30% toward wants and 20% toward savings and debt. The calculator shows it for reference, but it is a rule of thumb, not an official standard, and your own numbers matter more.
Why does the calculator treat debt payments as a need?
Minimum debt payments are a fixed cost you have to meet, like housing, bills, food, transport and insurance. The 50/30/20 guide groups debt with savings, which is why the calculator's needs share can look higher than the guide's.
What if my spending is higher than my income?
The result turns negative and a warning appears saying spending is higher than income. For example, with rent at $3,200 and the other defaults, spending is $5,700 against $5,200 of income, so you would be $500 short each month.
Does savings count as spending in a budget?
Yes. The savings line is treated as money spent, so the leftover figure is what remains after you have saved. In the default plan, $500 goes to savings and $700 is still left over at month end.
Where do yearly costs like insurance go in a monthly budget?
Divide each yearly cost by 12 and add the result to a monthly line. A $1,200 insurance renewal is $100 a month, and $600 of gifts is another $50. The calculator has eight fixed lines, so use the closest one.
Sources and updates
Updated: . How we check rates · Editorial team · Updates