Why should retainer and project income be tracked separately?

Retainer income is predictable and recurring, while project income is one-off and lumpy. Mixing them into one revenue line hides the true stability of the business.

What percentage of revenue should come from retainers ideally?

There's no universal answer, but consultants relying heavily on one-off projects typically face more volatile cash flow than those with a meaningful retainer base.

How should upfront retainer payments be recognised in Xero?

If a retainer covers a future period, it may need to be recorded as unearned revenue and recognised progressively, rather than booked entirely as income on receipt.

Does GST treatment differ between retainers and projects?

Generally no, both are taxable supplies for a GST-registered consultant. The complexity is more about revenue recognition timing than GST itself.

Retainer vs Project Income: Bookkeeping for Consultants

Published June 2026By True Tally Bookkeeping6 min read

One Revenue Line Hides a Lot of Risk

A consultant looking at total monthly revenue might feel confident, but that figure hides whether income is recurring and stable or lumpy and dependent on the next project landing. Splitting retainer income from project income in Xero exposes the real picture.

Why the Mix Matters More Than the Total

Retainer income is predictable, it arrives whether or not a new project is signed that month. Project income is one-off by nature. A consultant heavily reliant on project work faces real volatility, even if their average monthly revenue looks healthy on paper.

        Why this matters: two consultants earning the same annual revenue can have completely different risk profiles depending on how much of that income is locked in versus won fresh each month.
      

Recognising Upfront Retainer Payments Correctly

If a retainer payment covers a future period, say, a quarter paid upfront, it may need to sit as unearned revenue and be recognised progressively across that period, rather than booked entirely as income the moment it's received.

GST Treatment Is the Easy Part

Both retainers and project fees are generally taxable supplies for a GST-registered consultant. The complexity here is about revenue recognition timing, not GST itself.

Setting Up Xero to Show the Split

Separate income accounts for retainer revenue and project revenue.
Tracking categories if you want visibility by client as well as by income type.
A consistent process for handling upfront payments that span periods.

True Tally, bookkeeping for Mornington Peninsula consultants

We help Mornington Peninsula consultants set up Xero to track retainer and project income separately, so you can see your real cash flow stability. Book a free call to review your current setup.

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