You’ve completed a month’s bookkeeping, answered a payroll query and reviewed a cash-flow forecast. On the invoice, you could show every entry, group the work into services, or send a single total. That choice affects whether the client can see what their routine work cost, recognise the advisory work and check the rates you’ve charged.
Build the invoice around the service or project your client recognises, then add detail where it helps them assess the charge. Keep the complete time record behind that client-facing view.
Start with the client’s billing process
A project lead might recognise “forecast review”; their accounts team may need a project or purchase order reference to process it. The UK Small Business Commissioner’s guidance on getting invoices right recommends identifying the invoice recipient and requesting any required purchase order number early.
If an engagement combines a fixed monthly fee with hourly extras, show the fee and the additional work separately. Time records still help you assess fixed-fee work, but the invoice should reflect the pricing agreement.
Choose what each invoice line should represent
| Structure | When it helps | What the client can assess |
|---|---|---|
| Grouped by service or task | Recurring work where the activities are familiar and charged at the same rate. | What each service cost, such as monthly bookkeeping versus advisory work. |
| Grouped by project | Several projects, departments or budgets are covered by one invoice. | Which budget each charge belongs against. Within a project, separate services or rates where needed. |
| Individual dated entries | The client needs an activity breakdown, the work is new, or a particular charge needs explaining. | When the work happened and which activities make up the charge. |
A single summary line can suit a short piece of work with one agreed rate and a clear description. As services, rates or projects multiply, separate lines give the client more to assess.
Keep rates and scope visible when you group hours
Two people may have worked on the same project at different rates. Combining their hours into one line with an average rate makes it harder for the client to check the bill against the agreed rates. Separate the rates, or provide a breakdown alongside the summary.
Keep additional work and its agreed price visible alongside the routine service. That gives the client a reason for a higher-than-usual bill without making them reconstruct what changed.
Settle write-offs and billable versus non-billable hours before grouping. Keep excluded time in your records so it remains part of your engagement review, even though it stays off the bill.
Worked example: the same hours, two invoice structures
Harbour Books is billing Kōwhai Studio for bookkeeping and senior advisory work. The agreement uses separate hourly rates for those services and rounds each billable entry up to the next six-minute increment.
Establish the quantities before choosing the presentation
Scroll the time table to see all columns.
| Work recorded | Tracked | After rounding | Decimal hours |
|---|---|---|---|
| 3 Sep · Bank reconciliation | 1h 47m | 1h 48m | 1.8 |
| 10 Sep · Payroll query call | 7m | 12m | 0.2 |
| 16 Sep · GST return preparation | 2h 33m | 2h 36m | 2.6 |
| 24 Sep · Cash-flow forecast review | 1h 15m | 1h 18m | 1.3 |
| Total | 5h 42m | 5h 54m | 5.9 |
Apply the agreed billing increment once. Regrouping the billed entries for display should not introduce another round of rounding or change the charge. If you’re checking quantities from an export, the minutes-to-decimal-hours converter includes a reference chart and spreadsheet formulas.
If you log hours in a spreadsheet, our free billable timesheet template rounds each entry to your billing increment and totals what to invoice for each client.
Itemise the work when the client needs the activity detail
A query about the payroll call can be tied to its own line, rather than reopening a combined bookkeeping charge.
Harbour Books
Bookkeeping and advisory services
Invoice
HB-2026-009
Bill to
Kōwhai Studio
September bookkeeping and advisory
- Invoice date
- 1 October 2026
- Billing period
- 1–30 September 2026
- Payment due
- 15 October 2026
| Description | Billed hours | Hourly rate | Amount |
|---|---|---|---|
| 3 Sep · Monthly bank reconciliation | 1.8 | 150.00 | 270.00 |
| 10 Sep · Payroll query call | 0.2 | 150.00 | 30.00 |
| 16 Sep · GST return preparation | 2.6 | 150.00 | 390.00 |
| 24 Sep · Cash-flow forecast review (senior) | 1.3 | 190.00 | 247.00 |
Payment terms
Due within 14 days. Use HB-2026-009 as the payment reference.
- Total due
- $937.00
Group the work when the service totals are enough
The client can assess the monthly bookkeeping charge as a whole, while the senior review stays visible as a separately priced service.
| Service for September | Billed hours | Hourly rate | Amount |
|---|---|---|---|
| Bookkeeping: bank reconciliation, payroll query and GST return | 4.6 | 150.00 | 690.00 |
| Senior advisory: cash-flow forecast review | 1.3 | 190.00 | 247.00 |
| Total | 5.9 | 937.00 |
Both versions bill the same work at the same rates. Use the grouped view for routine approval, with the dated record available when the client needs to investigate a charge. For the complete document fields and regional requirements, see what to include on a service invoice.
Make the structure useful from one billing period to the next
Keep an agreed breakdown consistent across billing periods. Separating bookkeeping and advisory each month lets the client compare like with like and see which part of the service has changed.
If routine work takes longer over several periods, use the entries behind that category to distinguish a temporary problem with the client’s records from a lasting expansion of the service. That distinction helps you decide whether the scope, fee or way of working needs attention.
Build the client-facing invoice from your time records
In MinuteDock, select the uninvoiced Time Entries for the period and group the invoice lines by Task, Project or date. Your Billing Rates apply to the work, and you can review the descriptions and charges before sending. MinuteDock remembers each Contact’s formatting and grouping choices for future invoices; see MinuteDock’s billing features for how this works without re-keying the hours.
With Xero, the invoice arrives as a draft for you to review and send.
