Prepaid expenses sit in a deceptively simple category — cash has left the account, the expense appears coded, and it looks done — but the tax timing rules for prepayments mean that getting year-end entries wrong can misstate both the deduction year and the balance sheet.
At 30 June each year, bookkeepers need to review any payments made before year end that relate to services or benefits extending beyond that date. The treatment depends on whether the client is a small business entity, the nature of the prepayment, and how far into the future the prepaid period extends.
The General Rule: Prepayments Span the Income Year
For most businesses, the general rule under section 82KZL of the Income Tax Assessment Act 1936 is that a prepaid expense is only deductible in the income year to the extent it relates to that year. The portion relating to future income years must be carried forward as a prepaid expense asset on the balance sheet and deducted in the year or years to which it relates.
Example: An insurance policy running from 1 May 2026 to 30 April 2027 costs $12,000, paid in full on 1 May 2026. Under the general rule, only 2/12 ($2,000) is deductible in the 2025–26 income year. The remaining $10,000 is deferred to the 2026–27 year.
The journal entry at 30 June 2026:
- Debit Prepaid Insurance (asset) $10,000
- Credit Insurance Expense $10,000
This reduces the expense recognised in the year to the correctly apportioned amount and records the future economic benefit as an asset.
The 12-Month Rule
The 12-month rule is a concession that allows an immediate deduction for a prepaid expense where the eligible service period does not extend more than 12 months beyond the date of the payment and does not extend beyond the end of the next income year (i.e., 30 June of the following year).
For the above insurance example, the policy runs to 30 April 2027 — which is within 12 months of the payment date (1 May 2026) and does not extend past 30 June 2027. The 12-month rule applies, and the full $12,000 is immediately deductible in the 2025–26 income year.
Key conditions for the 12-month rule:
- The payment must be for a service period (not a purchase of trading stock, a capital asset, or an interest payment on a loan)
- The eligible service period must not exceed 12 months
- The eligible service period must end on or before 30 June of the income year following payment
- The payment must be made before the end of the income year in which the deduction is claimed
This rule applies to all businesses — it is not limited to small business entities. It is particularly useful for annual subscriptions, licence fees, rent prepayments, and professional memberships paid before 30 June.
Small Business Entity Concession
Clients who qualify as small business entities (aggregated annual turnover under $10 million) have an additional concession under Subdivision 328-D of the ITAA 1997. Small business entities can deduct a prepaid expense immediately even if the service period extends beyond 12 months — provided the payment is for a period of no more than 12 months. The practical effect is that the 12-month calculation is applied more generously, and there is no requirement to account for the beyond-year-end portion.
In practice, the distinction matters most when a client makes a large prepayment — such as two years of rent in advance, or a multi-year software licence — shortly before year end. For a general business, deferral is required. For a small business entity, the concession may permit an immediate deduction.
Confirm your client's small business entity status each year before applying this concession. A client who exceeded the $10 million aggregated turnover threshold during the year is no longer a small business entity for that income year, even if they were in the prior year.
Common Prepaid Expense Categories at Year End
Insurance: Policies with annual renewal dates that fall in the second half of the calendar year (July–December) are particularly common prepayment issues because they are often renewed and paid before 30 June. Review the coverage period on the policy schedule.
Subscriptions and software licences: Annual SaaS subscriptions, industry body memberships, and professional association fees are frequently paid in advance. Check the renewal date and coverage period against the invoice.
Rent: Where a commercial lease requires rent in advance (first and last month's rent, or quarterly payments in advance), the portion relating to periods after 30 June must be deferred unless the 12-month rule applies.
Interest: Interest prepayments are explicitly excluded from the 12-month rule and must always be apportioned on an accruals basis. This is a common misconception — clients sometimes assume that because they have paid interest in advance, the full amount is immediately deductible.
Recording Prepaid Expenses in the Accounts
Create a dedicated Prepaid Expenses account in the current assets section of the balance sheet (not the expense section). At year end:
- Identify all payments coded to expense accounts that relate to periods extending beyond 30 June
- Calculate the portion relating to periods after 30 June
- Journal the deferred portion: Debit Prepaid Expenses (asset), Credit the relevant expense account
- In the following year, reverse the entry at 1 July: Debit the expense account, Credit Prepaid Expenses
This approach keeps the expense ledger clean and ensures deductions are taken in the correct income year. Many cloud accounting platforms support recurring journal entries or automatic reversals — use this feature to ensure the reversal is not overlooked at the start of the new financial year.
Document the basis for each prepayment calculation in the client's workpapers: the invoice date, payment date, coverage period, apportionment basis, and whether the 12-month rule was applied. This is the first thing an ATO audit will request.