Recurring invoices for bookkeeping clients work best when the monthly fee is tied to a volume tier rather than hours, collected by autopay, and limited to the routine work in the engagement. Bill catch-up and cleanup separately, review every fee once a year, and agree in writing when work pauses if an invoice goes unpaid. Then the invoice can run itself.
Key takeaways
- Set the monthly fee by transaction and account volume tiers, not by last month’s hours.
- Autopay removes the chasing; a repeating invoice on its own only removes the typing.
- At Stripe’s published US rates, ACH Direct Debit costs 0.8% capped at $5, against 2.9% + 30¢ for cards.
- Keep catch-up, cleanup and year-end work off the recurring invoice and quote it separately.
- Write three rules into the engagement: when the tier changes, when fees are reviewed and when work pauses.
- Keep billing records with the rest of your business records for at least the IRS’s general three-year period.
Why do recurring invoices suit bookkeeping so well?
Monthly bookkeeping is the same job every month: bank feeds reconciled, transactions categorized, a close, a short report. When the work repeats, the bill should too. A recurring invoice is simply an invoice template that the system raises on a set day for the same amount, and ideally collects on its own.
The real gain is not the typing you save. It is cash flow you can predict and a conversation you never have to repeat. A client billed the same $650 on the 1st of every month stops questioning the fee. A client billed for "4.5 hours" one month and "7 hours" the next starts reading your invoices line by line.
But a recurring invoice only automates whatever fee you already set. If the fee is wrong, you have automated a loss. So start with the price.
How should you set the monthly fee?
Hours are a poor basis because they reward slow work and punish good systems. Volume is a better one: it is visible to the client, you can measure it from the bank feed, and it explains why one client pays more than another. Build a small set of tiers and put every client in one.
| Tier | Monthly transactions | Bank and card accounts | Typical extras included | Illustrative fee |
|---|---|---|---|---|
| Starter | Up to 100 | Up to 2 | Monthly close, P&L and balance sheet | $350 |
| Growth | 101–300 | Up to 4 | Plus accounts payable review | $650 |
| Established | 301–700 | Up to 6 | Plus class or location tracking | $1,150 |
| Custom | 700+ | 7+ | Quoted after a scoping call | Quoted |
The figures are illustrative; your own will depend on your market and cost base. What matters is that the tier boundaries are written down, because they become the trigger for changing the recurring invoice later. Payroll, sales tax filings and 1099 preparation can sit as add-on lines with their own fixed monthly price.
Worked example: putting three clients on recurring invoices
Here is how the tiers play out for three illustrative clients of a two-person practice in Austin.
- A landscaping company averages 180 transactions a month over two bank accounts and one credit card. That is Growth at $650. It also runs a biweekly payroll, added as a $120 line. Recurring invoice: $770 on the 1st.
- A solo therapist has 60 transactions and one account. Starter at $350. Recurring invoice: $350 on the 1st.
- A café has 520 transactions across five accounts, plus monthly state sales tax returns at $90. Established at $1,150 plus $90. Recurring invoice: $1,240 on the 1st.
That is $2,360 a month, or $28,320 a year, raised without anyone opening the invoicing screen. Now suppose the café opens a second site and volume climbs to 760 transactions. The written tier rule says it moves to Custom, so the firm quotes a new fee and changes one recurring invoice, rather than absorbing three extra hours a month for a year before anyone notices.
Should clients pay recurring invoices by card or ACH?
Autopay is what turns a recurring invoice into collected cash. The question is which method. On Stripe’s published US pricing, domestic cards cost 2.9% + 30¢ per successful payment, while ACH Direct Debit costs 0.8% with a $5.00 cap. Your own processor may charge differently, so check its current schedule.
Run those rates against the three clients above:
- $350 by card costs $10.45; by ACH, $2.80.
- $770 by card costs $22.63; by ACH, $5.00 (the cap applies).
- $1,240 by card costs $36.26; by ACH, $5.00.
Across a year, card fees on those three clients would be about $832; ACH would be about $154. On larger retainers the gap grows quickly because the ACH fee stops at the cap. Cards still have a place, especially for small fees or clients who insist, and some firms pass on a card surcharge where state law and card-network rules allow it. Whatever you choose, ask for the payment authorization at onboarding, alongside the engagement letter, not when the first invoice is overdue.
What should stay off the recurring invoice?
The recurring invoice should cover the routine month and nothing else. Mixing one-off work into it is the most common way a clean retainer turns into a dispute. Quote these separately, with their own invoice:
- Catch-up bookkeeping for months before the engagement started. Price it per month behind, and take payment before or during the work.
- Cleanup of miscategorized history or broken opening balances.
- Year-end work such as preparing the package for the tax preparer, unless your tier explicitly includes it.
- Projects: a software migration, a lender request, a new entity setup.
A useful test: if the work would not happen again next month, it does not belong on the recurring invoice. Clients also understand this split. They see a steady monthly fee for keeping the books and a separate quote when they ask for something extra.
Which rules keep recurring billing from going stale?
Recurring invoices fail slowly. Nobody looks at them because they work, and two years later the fee no longer matches the client. Three written rules, placed in the engagement letter, stop that drift.
- The tier rule. If average volume over a quarter crosses a tier boundary, the fee moves to the new tier from the next month, after written notice.
- The review rule. Every fee is reviewed once a year on a fixed date, such as the engagement anniversary, and any change is notified 30 days ahead.
- The pause rule. If an invoice is unpaid a set number of days after its due date, work for the next month pauses until the account is current, and deliverables such as the monthly report are held.
The pause rule matters most. Without it, a firm keeps closing the books for a client who has stopped paying, and the debt compounds monthly. With it, the conversation happens once, early, and follows terms the client already agreed. For the wider approach to choosing tools that support these rules, see our guide on how to choose practice management software.
How do you move existing clients onto recurring invoices?
New clients are easy: they start on a tier from day one. Existing clients billed hourly or by ad hoc invoices need a short transition, and doing it in batches avoids a flood of questions in one week.
- Measure. Pull six months of transaction counts and account numbers for each client from the bank feeds. Compare what each tier would have charged with what you actually billed and collected.
- Group. Clients whose fee barely changes can move first. Those facing a rise of more than about 15% deserve a phone call rather than an email.
- Write. Send each client a one-page note: their tier, what it includes, the monthly amount, the first billing date and the payment authorization link. Attach an updated engagement letter with the tier, review and pause rules.
- Switch. Start the recurring invoice on the 1st of a month, never mid-month, and close out any open hourly billing on a final ordinary invoice so the two systems never overlap.
Expect a few clients to ask why they are paying the same amount in a quiet month. The honest answer is that the fee buys a reliable close every month, not a count of hours, and that the tier rule works in their favor too: if volume falls and stays down for a quarter, the fee falls with it. Most clients prefer a number they can budget for.
Track two figures for the first six months: the share of clients on autopay and the number of invoices more than seven days late. Both should move the right way within a quarter. If late payments do not fall, the problem is usually that autopay was offered but never set up, so make the authorization part of the switch, not an optional extra.
What records should you keep for recurring billing?
Keep the engagement letter, the payment authorization, every invoice and every fee-change notice on the client’s record. If a client disputes a charge months later, those four documents answer it.
For your own tax records, the IRS page on how long to keep records sets a general period of three years, with longer periods in particular situations: six years if income is substantially underreported, seven years for a claim involving worthless securities or a bad debt deduction, and at least four years for employment tax records. A bad-debt write-off of an unpaid bookkeeping fee falls into the seven-year group, so keep those invoices and the related correspondence for longer.
Check also whether your lender, insurer or state board expects longer retention than the IRS minimum, and set your system’s retention to the longest requirement that applies.
How Zaquil handles recurring invoices for bookkeeping clients
In Zaquil, the monthly bookkeeping relationship lives in two linked places: a recurring job for the work and a recurring invoice for the fee.
The recurring job uses a monthly bookkeeping template with a checklist (bank feeds reconciled, payroll checked, close completed, report sent), so each month's work appears on the kanban board on schedule. The recurring invoice carries the tier fee plus add-on lines and a due date, and is raised on the same cycle. Time logged on catch-up or cleanup work stays as unbilled time and goes on a separate invoice, so one-off work never leaks into the retainer.
The client sees the invoice in their secure client portal and pays online there. If you use the pause rule, the monthly report can be uploaded to the portal but locked until the invoice is paid, so the client can see the report is ready and what is needed to open it.
Automations cover the rest: when an invoice passes its due date, send a polite reminder from the shared inbox; after a further set period, move the next month's job to an on-hold stage and create a task for the partner to call. Your annual fee review can be a recurring job with its own deadline, so nobody forgets it.
The accounting and tax setup includes monthly bookkeeping templates you can adapt, and the pricing page has a 14-day free trial with no credit card needed.
Frequently asked questions
What is a recurring invoice?
A recurring invoice is an invoice template that your billing system raises automatically on a fixed schedule, such as the 1st of every month, for the same or a predictable amount. It suits work that repeats, like monthly bookkeeping or payroll. Paired with autopay, it is raised, sent and collected without anyone in the firm having to touch it each month.
How do I price monthly bookkeeping for a recurring invoice?
Price by volume tier rather than hours. Count average monthly transactions and the number of bank and card accounts, then place the client in a tier with a fixed monthly fee. Add separate fixed lines for payroll, sales tax returns or other repeating services. Write the tier boundaries into the engagement letter so a change in volume has an agreed consequence.
Should bookkeeping clients pay by ACH or card?
ACH is usually cheaper for recurring fees. At Stripe’s published US rates, ACH Direct Debit costs 0.8% capped at $5.00, while domestic cards cost 2.9% plus 30 cents. On a $1,240 monthly fee that is $5.00 against about $36. Cards settle faster and some clients prefer them, so many firms offer both and encourage ACH.
Can I charge clients a card surcharge?
Sometimes. Whether you can add a surcharge for card payments depends on state law and the card networks’ rules, which include notice and cap requirements. Some states restrict surcharging. If you want to do it, check your state’s current rules and your processor’s terms first, and disclose the surcharge clearly in the engagement letter and on the invoice.
What should not go on a recurring bookkeeping invoice?
Anything that will not happen again next month. Catch-up bookkeeping for earlier months, cleanup of miscategorized history, year-end packages not included in the tier, software migrations and lender requests should each be quoted and invoiced separately. Keeping them off the recurring invoice protects the steady fee and makes extra work visible to the client.
How often should I review recurring bookkeeping fees?
At least once a year, on a fixed date such as the engagement anniversary, plus whenever average volume crosses a tier boundary over a quarter. Give clients written notice of any change, for example 30 days, as set out in the engagement letter. Reviewing on a schedule stops fees drifting below the real cost of the work.
What happens if a client stops paying a recurring invoice?
Follow the pause rule in your engagement letter. Send reminders after the due date, then pause the next month’s work and hold deliverables if the account stays unpaid after the agreed number of days. Pausing early keeps the debt to one month instead of several. If the account is never paid, you may need to end the engagement in writing.
Should catch-up bookkeeping be billed upfront?
It is common to take payment before or during catch-up work, because it is one-off, can be large and is often requested by clients who are already behind. Price it per month of backlog, agree the scope in writing, and invoice it separately from the monthly retainer. Some firms take a deposit and bill the balance on completion.
How long should I keep bookkeeping invoices?
The IRS generally suggests keeping business records for three years, with longer periods in some cases: six years for substantial underreporting, seven years for a bad debt deduction, and at least four years for employment tax records. If you write off an unpaid fee as a bad debt, keep the related invoices and correspondence for seven years.
Is a recurring invoice the same as a retainer?
Not quite. A retainer is the agreement to provide ongoing services for a fixed periodic fee; a recurring invoice is the billing mechanism that charges that fee on schedule. Some retainers are paid in advance and drawn down against hours, which suits advisory work less predictable than bookkeeping. For routine monthly bookkeeping, a fixed fee on a recurring invoice is simpler.
Should the monthly invoice be raised in advance or in arrears?
Both work, but billing in advance on the 1st for the coming month is common for fixed-fee bookkeeping, because it gets paid before the work is done and fits a pause rule neatly. Billing in arrears suits clients whose volume varies a lot. Whichever you choose, state it in the engagement letter and keep it consistent.
Can recurring invoices include variable add-ons?
Yes. Keep the tier fee fixed and add separate lines for items that vary, such as an extra payroll run or an additional state sales tax return. Showing the fixed base and the variable items as different lines makes the invoice easy to read and reduces disputes, because the client can see exactly what changed from last month.
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