Finkithub Financial Tools
Budget Calculator
Build a clearer picture of your monthly finances. Add your income and expenses to estimate your remaining balance, savings rate and spending breakdown, then compare your budget with a simple planning guideline.
Plan Your Monthly Budget
Enter your monthly take-home income and typical expenses. You can edit categories, add new ones or remove any you do not use.
Monthly expenses
Optional savings and investments
Where your income goes
Expense breakdown
Compare with the 50/30/20 guideline
This common budgeting guideline suggests allocating about 50% of take-home income to needs, 30% to wants and 20% to savings and debt goals. It is a starting point, not a universal rule.
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What Is a Budget Calculator?
A budget calculator helps you compare the money you receive with the money you spend and set aside. It can make monthly cash flow easier to understand, highlight spending categories that take up a large share of your income, and show how much remains after your planned expenses.
You can use a monthly budget to plan for rent, food, transport, utilities, debt payments, savings and investments. The most useful budget is one that reflects your actual income, regular bills and financial priorities rather than an idealised set of percentages.
Budget Calculator Formula
Total expenses = Sum of all monthly expense categories
Remaining balance = Monthly income − expenses − planned savings − planned investments
Expense ratio = (Total expenses ÷ monthly income) × 100
Available savings rate = (Remaining balance ÷ monthly income) × 100
The available savings rate measures what remains after the expenses and planned savings or investments you entered. It can be negative if your planned outflows exceed your income. If income is zero, percentage ratios are not defined and are shown as unavailable.
The 50/30/20 comparison is calculated using 50% of take-home income for needs, 30% for wants and 20% for savings or debt goals. Because the calculator cannot reliably determine whether each custom expense is a need or a want, you can review and classify those categories yourself.
Monthly Budget Example
Suppose your take-home income is 4,000 per month. Your listed expenses total 2,500, planned savings are 500, and planned investments are 200. The remaining balance is 800.
4,000 − 2,500 − 500 − 200 = 800 remaining
The remaining balance is 20% of income. This amount has not yet been allocated to a specific goal, so you could use it for additional savings, irregular bills or discretionary spending.
This example is illustrative. Enter your own numbers above to produce a budget summary using your selected currency format.
Tips for Building a Practical Budget
- Use take-home income rather than gross salary when planning day-to-day spending.
- Include irregular expenses by estimating their monthly equivalent.
- Separate debt repayments from discretionary purchases.
- Set a realistic savings target that does not leave essential bills unpaid.
- Review your spending against bank statements and update your estimates each month.
- Adapt budget percentages to your cost of living, family needs and financial goals.
Frequently Asked Questions
How much of my income should I save?
The 50/30/20 guideline suggests putting about 20% of take-home income toward savings and debt goals. This may not be practical for everyone. Choose an amount that fits your essential costs, debt obligations and goals.
What is the 50/30/20 budgeting rule?
It is a budgeting guideline that allocates approximately 50% of take-home income to needs, 30% to wants and 20% to savings or debt goals. It is not a strict requirement, and your own proportions may need to differ.
What should I include in monthly expenses?
Include housing, food, utilities, transport, insurance, debt payments, subscriptions, childcare, healthcare and other recurring or expected costs. You can add custom categories to cover your situation.
What if my expenses are higher than my income?
The calculator will show a negative remaining balance. Review your spending, essential bills and available income, then consider changes that are realistic and sustainable. Do not ignore required payments.
Does this calculator store my budget information?
This calculator performs calculations in your browser and does not include a feature to save or send your entries to a server. Your hosting environment, browser extensions or other site scripts may operate independently, so review the website's privacy policy.
Does changing currency convert my budget?
No. The currency selector changes number formatting only. It does not fetch exchange rates or convert amounts. Enter income and expenses in the same currency.
Important: This calculator provides general budgeting estimates for educational purposes. It is not personalised financial, investment, tax or debt advice. Results depend on the figures entered and may not include every cost or obligation.