How does a retainer work?
- The fee is fixed for the period and covers a stated number of hours or a stated scope of work.
- Payment is in advance, which is what reserves the capacity and separates a retainer from invoicing after the fact.
- Scope is defined in writing, with anything outside it quoted separately rather than absorbed quietly.
- Australian agencies publish assistant retainers around A$800 to A$3,000 a month, and UK provider SmartPA lists plans from £330 for 10 hours.
- Notice periods, usually 30 days, govern how either side ends the arrangement.
A worked example
A four-attorney firm in Rhode Island put its intake support on a monthly retainer rather than paying by the call. The fee reserved 40 hours: new client calls answered during business hours, conflict checks logged, and files opened the same day. Volume swung between 30 and 55 hours across the year. The managing partner valued the predictable line on the budget more than paying exactly for what was used each month, and reviewed scope once a quarter.
Where does a retainer show up in your tools?
Retainers appear as a recurring invoice in QuickBooks Online or Xero, often on a card or direct debit, with the scope in a signed agreement and the month's delivery summarized in a report. Anything outside scope should arrive as a separate quote, not a surprise on the invoice.
Common mistakes
- Agreeing a retainer with no written scope, so both sides argue later about what was included.
- Paying a retainer for months of low usage without renegotiating the size of the block.
- Assuming a retainer means unlimited availability, including evenings and weekends, because the fee is fixed.
Why does a retainer matter?
A retainer makes a variable cost predictable and gives the provider enough certainty to hold a person for you. For a small business, that predictability is usually worth more than paying to the minute. It only works when the scope is written down and both sides revisit it as the work changes.
How does AssistBPO handle a retainer?
AssistBPO engagements are staffed as covered desks with a named assistant, a backup and a team lead, and the commercial terms are set out in your service agreement rather than published as a rate card. Scope, notice and what sits outside the monthly arrangement are agreed before the first day. Plans depend on hours, desks and coverage.