Income annualisation converts pay received in any frequency — hourly, weekly, fortnightly, monthly, or year-to-date — into the annual gross figure that mortgage lenders, the ATO and most financial calculators expect. This calculator handles each input frequency and produces a clean annual number.
Why annualisation matters
Three main use cases:
1. Mortgage applications. Lenders calculate borrowing capacity against gross annual income. Annualisation converts your actual pay pattern to that figure. Annualisation also handles year-to-date income — e.g. applying in March of a new tax year, with only 11 weeks of income in the current year, means the lender needs the annualised equivalent.
2. Tax planning. The ATO's tax brackets are annual. To estimate where you'll land — and the impact of additional income, salary sacrifice, or deductions — you need to start from the annual figure.
3. Budget conversion. Your bills run monthly. Your pay arrives weekly or fortnightly. Knowing your annual figure helps you sanity-check whether a per-month budget actually fits the per-pay reality.
Conversion formulas
Each frequency converts to annual:
- Hourly: rate × hours/week × 52
- Weekly: weekly amount × 52
- Fortnightly: fortnightly amount × 26
- Monthly: monthly amount × 12
- Year-to-date: YTD ÷ weeks elapsed × 52
The 52-week assumption (rather than 52.18, which accounts for leap-year fractions) is standard for most lender and tax purposes. Slight rounding differences are not material.
Worked examples
Hourly worker: $32/hour × 38 hours × 52 = $63,232 annualised.
Fortnightly salary: $3,500 × 26 = $91,000 annualised.
YTD in March (week 11): $14,500 ÷ 11 × 52 = $68,545 annualised.
When annualisation under-estimates or over-estimates
Over-estimates true annual income:
- Employee took unpaid leave in the YTD period (calculation assumes consistent pay)
- Bonuses paid early in the year inflate YTD above the base
- Overtime in the YTD period that won't continue
Under-estimates true annual income:
- Bonuses, commission, or 13th-month payments expected later in the year
- Salary increase recently received that hasn't fully flowed through
- Variable industry pay (mining, construction) that's seasonal
For mortgage applications, lenders typically conservative — they take the lower of (annualised YTD) and (contracted base × 12 months) when there's a discrepancy. For budgeting and tax planning, use the trailing 12-month figure rather than annualisation if your income is volatile.
What annualisation excludes
The calculator outputs gross income from your primary pay structure. Other income types should be added separately:
- Investment income (rental, dividends, interest) — declared in tax return, can support borrowing capacity
- Government benefits — some included in lender's serviceability, often shaded
- Side income — usually requires 1–2 years of trailing returns to be included
- Trust distributions — variable; 2-year averaging typical for lender purposes
For mortgage applications with multiple income types, run each through the appropriate calculation method and sum them for the lender's assessment.
Frequently asked questions
Why do mortgage brokers use annualised income?
Lenders assess borrowing capacity against gross annual income. Income that arrives weekly, fortnightly, or monthly needs to be converted to an annual equivalent for the lender's serviceability calculation. Annualisation is also used to handle YTD income (e.g. someone applying for a loan in March, with only 3 months of income in the current tax year) and to compare offers in different pay frequencies.
How is hourly income annualised?
Hourly rate × hours per week × 52 weeks. So $35/hr × 38 hours × 52 = $69,160 gross annual. The 52-week assumption excludes leave that would already be paid for in salary structures, but should match casual/contract patterns where leave is unpaid. For inconsistent hour patterns, average the hours over the past 12 months for a more accurate estimate.
Is YTD annualisation reliable?
For salaried employees with consistent income — yes. (YTD ÷ weeks elapsed) × 52 gives a clean annual figure. For commission-heavy or seasonal workers — not very. The first quarter of the year often has lower bonuses and seasonal commission, so annualising YTD in March overstates true annual income for most variable-income earners. Lenders typically require 2 years of trailing income in those cases.
Should annualised income include bonuses and commission?
For lender purposes: yes, but typically with a haircut (50–80% of bonus included, depending on lender and consistency). Lenders want to see 2+ years of bonus history to include the full amount. For tax and personal budgeting: include bonuses and commission at 100% in the annual figure since they're real income.
How do you annualise irregular contractor income?
Use 12-month trailing income rather than YTD annualisation. Contractors often have lumpy invoicing — large months and quiet months — that doesn't annualise cleanly from a partial year. Banks typically require 2 years of contractor income (tax returns + financials) and average them. The annualisation calculator works best for stable PAYG or hourly/weekly patterns.
What's the difference between gross and net annualised?
Gross is pre-tax income. Net is after-tax take-home. Lenders use gross for borrowing capacity; you use net for budget planning. The calculator outputs gross — pair with the income tax calculator to convert to net.
Why does my annualised figure differ from my contracted salary?
Common reasons: (1) the contract excludes leave loading, super, or shift loadings that show up in your YTD, (2) overtime or shift work has lifted your YTD above the base, (3) bonuses paid in the current YTD elevate the annualised figure above your underlying base. Banks usually look at both — the contracted base AND the annualised actual — and may use the lower figure for conservatism.
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Last updated: 2 May 2026