Primary Production Averaging Calculator

Supply the Relevant Income History

The primary production averaging calculator compares basic tax with the averaging adjustment from your client’s confirmed income history. Enter whole-dollar taxable components for the current year and each relevant prior year. It supports full-year adult residents using ordinary rates.

Choose how many consecutive assessments include averaging, counting the current year. One assessment uses two income years. Two use three years, and three use four. Four or more use the current year and four prior years.

The first assessment with averaging must have preceding basic income no greater than current basic income. Confirm commencement and any withdrawal before choosing ordinary history. Unknown history, a withdrawal or a special reset produces an unresolved result.

Use the primary production averaging guide to establish eligibility and elections. A confirmed re-entry or permanent-reduction reset needs its own history review before an ordinary calculation applies.

Separate the Income Components

Enter the primary and non-primary taxable components after the statutory exclusions and your deduction allocation. Their sum is basic taxable income in this supported non-loss calculation. The calculator cannot classify income from an account name.

Basic taxable income excludes net capital gains, specified superannuation benefits and employment termination payments. It also excludes above-average special professional income. Recompute affected deductions when the statutory method requires it.

Record excluded current-year income separately for the workpaper. This field does not subtract the amount again: the component fields already exclude it. A $20,000 net capital gain therefore stays outside both component fields.

Incorrect: enter all taxable income as the primary component and subtract capital gains in the record-only field. Correct: calculate the statutory components first, then record exclusions separately.

Choose loss treatment required when deductions create cross-source losses or the nil-primary-income loss shade-out rule applies. The calculator leaves these cases unresolved. Confirm non-commercial loss treatment before entering a basic income amount.

Compare Tax With Averaging

Add the selected years’ basic taxable income, divide by the number of years and round the average down to whole dollars. Apply the selected current-year basic rates to that average. Divide the resulting tax by average income to obtain the comparison rate.

The calculator compares current basic income multiplied by the comparison rate with tax at ordinary basic rates. Their absolute difference is the gross averaging amount. Multiply that difference by the averaging component divided by current basic income.

The averaging component includes all basic income when non-primary income is no more than $5,000. Between $5,000 and $10,000, it includes primary income plus $10,000 less non-primary income. At $10,000 or more, only primary income remains.

A lower comparison-tax amount gives an averaging offset. A higher amount gives extra income tax. Basic tax after adjustment subtracts the offset or adds the extra tax. Equal amounts produce no adjustment.

Division 392 of the Income Tax Assessment Act sets the history, income and adjustment rules. The Income Tax Rates Act supplies the basic rates. The display rounds estimates to whole dollars and the comparison rate to two decimals. Calculations retain the unrounded rate.

Work Through Higher and Lower Income

The fictional opening example uses 2026-27 ordinary resident rates. Prior basic incomes are $40,000, $50,000, $60,000 and $70,000. Current primary income is $100,000, with no non-primary income. Average income is $64,000.

Tax on $64,000 is $9,720. The comparison rate displays 15.19%. Current basic tax is $20,520 and tax at the unrounded comparison rate is $15,188. The gross amount and offset both display $5,333. Basic tax after adjustment displays $15,188.

For a lower-income example, set each prior year to $70,000 and current primary income to $30,000. The $62,000 average gives $9,120 of tax and a displayed comparison rate of 14.71%. Basic tax is $1,770. Extra tax displays $2,643, taking basic tax after adjustment to $4,413.

For a mixed-income example, keep the opening history and split current income into $92,500 primary income and $7,500 other income. Basic income and the gross amount remain unchanged. The component becomes $95,000 and the offset displays $5,066. Basic tax after adjustment displays $15,454.

Resolve an Incomplete Calculation

Missing income is different from nil income. Enter zero only when your records establish a nil component. An empty field makes dependent figures unavailable. An unconfirmed exclusion or unsupported history also removes the tax estimate.

The calculator supports non-negative components without cross-source losses. It does not decide whether your client carries on a primary production business. It also leaves foreign residents, part-year residents and special tax categories unresolved.

Medicare levy, other offsets, withholding and tax on excluded amounts sit outside this basic-tax comparison. Use the tax calculator for the separate annual estimate. Do not treat this averaging workpaper as the final balance payable.

Retain the Averaging Workpaper

Download the CSV workpaper to retain included years, income components and exclusions. It also records the comparison rate at full precision, the averaging component and adjustment. The optional source reference links your calculation to your own records without entering client identifiers.

All calculations run on your device. The calculator sends no entered income to a provider and stores none of it in browser storage. Download the workpaper before leaving the page if you need a copy.

The result is a local estimate. The ATO assessment can include other return items and a different averaging history. If a difference remains unexplained, reconcile the included years and statutory components before relying on the adjustment.