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SOUTHERN ALPHA

Money · Budgeting

Australian Budget Calculator

Build a monthly budget that actually fits your pay packet. Toggle between the 50/30/20 rule and zero-based budgeting — your take-home is calculated from ATO rates, not guessed.

Needs
$3,930
Target $3,076 · +$855
Wants
$920
Target $1,845 · −$925
Savings & Debt
$900
Target $1,230 · −$330

Where your money goes

Needs — $3,930Wants — $920Savings & Debt — $900

Needs50% target

$3,930/ target $3,076
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$
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$
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Wants30% target

$920/ target $1,845
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Savings & Debt20% target

$900/ target $1,230
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$

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Frequently asked questions

What is the 50/30/20 budget rule?

Popularised by US Senator Elizabeth Warren, the 50/30/20 rule splits your after-tax income into three buckets: 50% on Needs (rent, groceries, utilities, insurance, minimum debt), 30% on Wants (dining out, subscriptions, hobbies, travel) and 20% on Savings & Debt (emergency fund, investing, extra repayments). It's a useful first cut for Australians earning a regular wage.

What is a zero-based budget?

Zero-based budgeting means assigning every dollar of take-home pay a job — bills, groceries, savings, fun money — until 'income minus allocations' equals zero. It forces you to be intentional about every category and is the approach behind apps like YNAB. Use it if 50/30/20 feels too loose or your income is irregular.

Does this calculator use gross or after-tax income?

After-tax (take-home) income. You enter your gross salary and we compute monthly take-home using FY 2025-26 ATO resident rates, the 2% Medicare levy, and HECS if you opt in. The 50/30/20 targets and the zero-based 'left to allocate' tile are both based on that net figure.

Should HECS come out of Needs or Savings?

Neither — it's withheld from your pay before you see it, so toggle 'I have a HECS debt' on and it reduces your take-home automatically. Only put extra voluntary HECS repayments in the Savings & Debt bucket.

How do I budget on an irregular income?

Budget against your average lowest-three-months take-home, not your peak. In high months, sweep the surplus into a buffer account (3 months of essential expenses) before allocating to wants. Once the buffer is full, top up super or pay down debt.

What counts as a 'Need' vs a 'Want'?

Needs are essentials you'd struggle to drop in a tight month — housing, utilities, groceries, basic transport, insurance, minimum debt repayments, childcare. Wants are anything you choose for lifestyle — dining out, streaming, gym, holidays, brand-name shopping. The line is personal: a car is a Need if you can't get to work without it, otherwise it's a Want.

Is 20% really enough to save in Australia?

For most people in their 20s and 30s, no — especially if you want to buy a first home or retire before 67. Aim for 25-30% combined savings + investing + extra mortgage if you can. The 50/30/20 rule is a floor, not a ceiling.

Does this save my budget?

No — everything runs in your browser and nothing is sent to a server or stored beyond the current page. Take a screenshot if you want to keep it.

How to actually use a budget that sticks

Most budgets fail because they're built for a fantasy version of you. The two frameworks this tool supports — 50/30/20 and zero-based — are both designed for the real you, with different trade-offs.

50/30/20 in one paragraph

Take your monthly take-home pay. Half should cover the things you genuinely can't skip (rent, groceries, utilities, transport, insurance, minimum debt). Up to 30% covers everything you choose for lifestyle. The remaining 20% goes to building wealth — emergency fund, investing, extra debt repayments. If your Needs already eat 65%, you have a cost-of-living problem, not a discipline problem.

Zero-based budgeting, briefly

Zero-based means you assign every dollar a category until "take-home minus allocations" equals zero. There is no leftover — savings is itself an allocation. It's the most accurate way to budget irregular income (assign last month's pay this month) and the strongest behavioural tool for people who tend to spend whatever is in the account.

Aussie-specific things to remember

  • Super is forced savings. The 11.5% SG is already coming out of your pre-tax pay — don't double-count it in the 20% bucket. Voluntary contributions do count.
  • HECS is taken at source. Toggle it on and we shrink your take-home accordingly — you don't need a HECS line item.
  • Quarterly bills hurt budgets. Power, water, council rates, car rego — divide by 12 and stash monthly into a separate account.
  • Annual subscriptions creep. Audit them once a quarter. The average Australian household carries $1,400/year of forgotten subs.

If your budget says you're broke at the end of every month

Run the numbers honestly first — most "I have no money" surprises come from underestimating Wants by 30-50%. If Needs alone exceed 60% of take-home, no budget framework will save you; you need to attack the big three: housing (downsize, refinance, take in a renter), transport (drop a second car, switch to public) or income (negotiate, side hustle, change roles). The 50/30/20 line is a diagnostic, not a personality test.

What to do with your first $1,000 of monthly savings

  1. Build a $2,000 starter emergency fund in a high-interest savings account.
  2. Capture the full employer super match if you have one available.
  3. Knock out any debt above ~7% interest (credit cards, personal loans).
  4. Top emergency fund to 3 months of essential expenses.
  5. Then invest the rest — ETFs inside or outside super depending on your timeline.
50/30/20 targets are applied to your monthly take-home pay. The zero-based view treats any positive "left to allocate" as unassigned — the goal is to drive it to $0 by lifting your savings, investing or extra debt repayments until every dollar has a job.