Personal Budget Calculator
Enter your household income and expenses with their frequency. We convert everything to a monthly figure and show your surplus or shortfall.
Covers wages, Centrelink, rental and investment income against 46 common household expense items across 15 categories.
Every income source, every expense, one monthly figure
All income, converted to monthly
Wages, Centrelink, child support, rental, investment and side-hustle income — whatever frequency you get paid, converted to a single monthly figure.
46 expenses, 15 categories
Housing, utilities, insurance, groceries, transport, childcare, health, debt, entertainment, pets, travel, savings and more — a comprehensive household expense list.
Your real surplus or shortfall
Everything updates live as you type, so you can see straight away whether your household is ahead, behind, or right on the line each month.
Personal Budget Calculator
Enter your household income and expenses with their frequency. Everything converts to monthly automatically as you type.
Part A — Income Sources
| Income Type | Amount ($) | Frequency | Monthly Equivalent | Notes |
|---|---|---|---|---|
| Total Household Income (Monthly) | $0.00 | |||
Part B — Household Expenses
| Category | Expense | Amount ($) | Frequency | Monthly Equivalent |
|---|---|---|---|---|
| Total Household Expenses (Monthly) | $0.00 | |||
Part C — Surplus or Shortfall
Total income (monthly)
Total expenses (monthly)
Surplus / (shortfall)
Tip: amounts accept $ and commas (e.g. "$1,200"). Figures convert to monthly using the guide above, and update as you type.
Budget calculator questions
Why does everything convert to monthly?
Income and expenses rarely land on the same schedule — wages might be fortnightly, insurance annual, and groceries weekly. Converting everything to a common monthly figure is the only way to compare them meaningfully.
How accurate are the weekly and fortnightly conversions?
Weekly amounts are multiplied by 4.33 and fortnightly by 2.17, reflecting that there are slightly more than 4 weeks and 2 fortnights in an average month (52 weeks and 26 fortnights per year, divided by 12). Quarterly, 6-monthly and annual conversions are exact.
Can I use this for a single-person budget, not just a household?
Yes — just leave any items that do not apply to you blank. The calculator only totals what you enter.
Does this save my information?
No — everything you enter stays in your browser only and is not sent anywhere or stored. Use Export CSV or Print if you want to keep a copy.
What if my income and expenses roughly balance?
A small surplus is healthy, but if you are consistently right on the line it is worth reviewing which expenses could flex in a tighter month. We are happy to talk through your situation if that would help.
Keep exploring
Important information: This calculator provides general estimates only, based on the figures and frequencies you enter, and does not take into account your full financial circumstances. It is not personal financial advice. Obtain advice relevant to your circumstances from Lockyer Accounting & Tax.
Get in Touch
07 5317 6040
3/2 Summerholm Rd, Hatton Vale
PO Box 396, Gatton QLD 4343
Mon to Fri - 8am to 4pm
Saturday appointments available on request