Merge Multiple Invoices for Consolidated Billing

OctopusPro’s merged invoice feature lets you combine multiple eligible invoices for the same customer into one consolidated invoice, also known as a group invoice or statement-style invoice. This is useful when you want to bill a customer once for multiple completed jobs, visits, products, or service dates instead of sending several separate invoices.

This creates a cleaner, more professional billing workflow for periodic billing, repeat services, contract accounts, multi-site customers, and high-volume accounts. Instead of asking the customer to review and pay several invoices, you can issue one clear invoice that groups the work together in a more organised and easier-to-manage format.

Merged invoices are especially useful for businesses that provide ongoing maintenance, commercial cleaning, property management, facilities management, pool servicing, pest control, recurring trade work, and other services where the same customer may receive multiple bookings over a billing period.

On this page:
What this feature does | When to use merged invoices | Benefits | Merged invoices and billing cycles | Important rules before you start | How to merge invoices | How to review the merged invoice | How to manage a merged invoice later | Rules and limitations | Examples and use cases | Best practices | Related user guide pages | FAQs

What this feature does

The merged invoice feature allows you to combine multiple invoices into one consolidated invoice for the same customer. The new merged invoice becomes the main invoice record for that group of charges and gives you a clearer billing summary for a period, project, account, or service agreement.

A merged invoice can help you:

• combine multiple job invoices into one invoice
• reduce invoice clutter for customers and admin staff
• support weekly, fortnightly, monthly, milestone-based, or custom billing workflows
• simplify statement-style billing for repeat and commercial customers
• make it easier to send, track, and reconcile one invoice instead of several
• preserve a clearer audit trail for grouped work

For a broader overview of invoicing and payments in OctopusPro, see Invoice, Billing, Payment, and Refund Management.

When to use merged invoices

Merged invoices are ideal when the same customer has more than one invoice that should be billed together.

Common examples include:

• Periodic billing: Combine weekly or fortnightly service visits into one monthly invoice.
• Commercial or contract clients: Issue one invoice per billing period instead of one invoice per job.
• Multi-site accounts: Group charges for multiple bookings completed for the same customer.
• Large multi-stage projects: Combine several invoices into one invoice for easier review and approval.
• Customer-mandated single-payment documents: Some organisations require one payable document for internal approval, purchase order matching, or compliance.
• One-off consolidation: Merge invoices manually when you need one consolidated invoice without setting up an ongoing billing cycle.

If you want an ongoing recurring billing arrangement for a customer, see Customer Billing Cycle Management for Consolidated Billing.

Benefits of merged invoices

• Better customer experience: Customers receive one invoice instead of multiple smaller invoices.
• Less admin work: Your team spends less time sending, chasing, and reconciling separate invoices.
• Lower payment friction: Customers can pay once instead of processing multiple payments.
• Cleaner accounts receivable workflow: Fewer open invoices can make outstanding balances easier to monitor.
• More professional billing: Statement-style invoices are often preferred by contract, commercial, and corporate customers.
• Better audit visibility: The merged invoice groups multiple charges into one billing record while still relating back to the original work.

Merged invoices and billing cycles

Merged invoices are useful for manual invoice consolidation, but they can also work as part of a broader billing-cycle workflow.

A customer billing cycle determines when a customer should be billed, such as weekly, monthly, quarterly, or on a custom schedule. The merged invoice workflow determines how multiple invoices are consolidated into one invoice for that billing period.

This means you can use merged invoices as a manual tool for one-off consolidation, or as part of a more structured recurring billing process for repeat customers.

To manage recurring consolidated billing at the customer level, see Customer Billing Cycle Management for Consolidated Billing. To control payment due dates after the merged invoice is created, see Invoice Due Dates & Payment Terms.

Important rules before you start

Before merging invoices, make sure you understand these rules clearly:

• Same customer only: You can merge invoices only when they belong to the same customer.
• Review invoice accuracy first: Check the original invoices before merging so you do not carry errors into the consolidated invoice.
• Handle payments first: If a payment already exists, remove or refund it first before attempting to merge.
• Handle external accounting sync first: If an invoice has already been synced to external accounting software such as Xero or QuickBooks, unsync it and remove the external copy before merging or reverting.
• Use merged invoices for invoice consolidation only: They are not for merging customers, merging quotes directly, or manually rebuilding invoice data from scratch.

If you need to check invoice details before merging, see How to View and Manage an Invoice in OctopusPro.

How to merge invoices

Step 1: Search for and select the invoices

1. Go to the Invoices page.
2. Use Advanced Search to filter the invoices.
3. Filter by Customer and any other relevant criteria such as label, status, date range, or fieldworker if needed.
4. Select two or more eligible invoices for the same customer.

This helps ensure you are merging the correct invoices for the correct customer and billing period.

Step 2: Click Merge Invoices

Once you have selected the invoices, click Merge Invoices. You may also be able to do this from the customer profile invoice area when working within that customer’s record.

OctopusPro will then create one consolidated invoice from the selected invoices.

Step 3: A new invoice number is created

After the merge is completed, OctopusPro generates a new invoice number for the merged invoice. The original invoice IDs are retired, but searching the old invoice numbers redirects you to the new merged invoice so traceability is preserved.

How to review the merged invoice

Open the new merged invoice to review the grouped charges, totals, tax, and balance due.

The merged invoice layout is similar to a normal invoice, but it gives you a consolidated view of the included work. Depending on your configuration, it can:

• group charges by service date or product date
• list the related booking number beside each line item
• roll up taxes and the outstanding balance
• present multiple invoice components in one billing summary

Once reviewed, you can continue your normal invoice workflow such as sending the invoice, taking payment, tracking receipts or refunds, locking the invoice, or adding more eligible invoices later if needed.

For the next steps after merging, see Send Invoices by Email or SMS, View Invoice Payments, Receipts & Refunds, and Locking / Unlocking Merged Invoices to Manage Billing Cycles.

How to manage a merged invoice later

Add more invoices to an existing merged invoice

If you later need to add more eligible invoices for the same customer, you can select the merged invoice together with additional eligible invoices and merge again.

This is useful when extra work is completed before the billing period closes or when an invoice was missed during the original merge.

Revert a merged invoice

If a merged invoice was created by mistake, you can revert it in eligible cases and restore the original invoices.

You can only revert a merged invoice when it has no payments and is not synced to external accounting. If payments already exist, remove or refund them first.

Search and visibility

The merged invoice appears in the invoice list with a merged label. Original invoice numbers redirect to the new merged invoice. Merged invoices are intended for admin-level billing management, while fieldworkers continue to see only their own booking-level billing details rather than the full grouped invoice.

Rules and limitations

To maintain billing accuracy and a clean audit trail, merged invoices follow important rules.

• Same customer only: You can merge invoices only when they belong to the same customer.
• No revert after payment unless cleared: A merged invoice that has received payments cannot be reverted until the payments are removed or refunded.
• External accounting sync must be handled first: Unsync invoices before merging or reverting if they have already been sent to external accounting.
• Edit source records, not the merged invoice: If pricing, tax, labour, or other line-item details need correction, update the source booking or source invoice first.
• Restricted visibility: Merged invoices are admin-facing billing records.

If you use imported payments or payment reconciliation workflows, review those steps before merging. For help with payment matching and imported payments, see Payment Import & Reconciliation.

Examples and use cases

• Commercial cleaning: Roll four weekly cleans into one month-end invoice so the customer receives one statement instead of four separate invoices.
• Pool servicing contract: Combine multiple visits in the same month into one invoice with separate service-date rows.
• Property management portfolio: Consolidate multiple maintenance jobs for the same customer into one payable invoice.
• Facilities maintenance agreement: Group services completed during the cycle into one invoice for easier internal coding and approval.
• Large renovation or staged project: Merge labour, materials, and related charges into one milestone invoice.
• Subscription or support services: Combine multiple call-outs during the billing period into one monthly statement.

Best practices

• Merge before emailing or syncing: This avoids duplicate emails and duplicate accounting exports.
• Review invoice details first: Make sure the source invoices are correct before merging them.
• Handle payments first: Remove or refund payments before attempting to merge if payment exists.
• Edit source records where needed: Correct tax, labour, pricing, or service details on the original booking or invoice before merging.
• Use labels and filters: This makes it easier to find the invoices that belong in the same billing period.
• Use billing cycles for repeat customers: If the customer is billed this way regularly, combine this workflow with customer billing cycles.
• Lock the merged invoice after final review: This helps protect the issued invoice from accidental edits or later changes.
• Keep due dates separate from invoice grouping: Merging controls consolidation, while invoice due dates control when payment is due.
• Include a short cover note when sending the invoice: Summarise the billing period, PO number, or contract reference to make approval easier for the customer.

If the work itself is recurring, see Recurring Booking Software | Repeat & Scheduled Appointments. If you need to review the related booking records, see View & Manage Booking Details.

Related user guide pages

• Invoice, Billing, Payment, and Refund Management
• How to View and Manage an Invoice in OctopusPro
• Invoice Due Dates & Payment Terms
• Customer Billing Cycle Management for Consolidated Billing
• Locking / Unlocking Merged Invoices to Manage Billing Cycles
• Send Invoices by Email or SMS
• View Invoice Payments, Receipts & Refunds
• Payment Import & Reconciliation
• Recurring Booking Software | Repeat & Scheduled Appointments
• View & Manage Booking Details
• View Customer Details in OctopusPro

FAQs

What is a merged invoice?
A merged invoice is a single consolidated invoice created from multiple eligible invoices for the same customer.

Can I merge invoices for different customers?
No. You can merge invoices only when they belong to the same customer.

Can I merge invoices that already have payments?
No. If a payment already exists, remove or refund it first before merging.

Can I revert a merged invoice later?
Yes, in eligible cases. A merged invoice can be reverted only if it has no payments and is not synced to external accounting.

What happens to the original invoice numbers after a merge?
OctopusPro creates a new invoice number for the merged invoice. Searching the original invoice numbers redirects you to the new merged invoice.

Can I add more invoices to a merged invoice later?
Yes. In eligible cases, you can select the merged invoice together with additional eligible invoices and merge again.

Can I merge quotes directly?
No. Quotes must first be converted to invoices before they can be included in an invoice merge.

Will reminders, due dates, or late-fee workflows still apply?
They follow the merged invoice’s own terms and balance after the merge.

Can fieldworkers view the merged invoice?
No. Merged invoices are intended for admin-level billing management. Fieldworkers continue to see their own booking-level billing details only.

Should I merge invoices before syncing to accounting software?
Yes. In most cases, it is best to merge before exporting or syncing to external accounting to avoid duplication and reconciliation issues.

Who should use this feature?
This feature is ideal for admin users managing billing for repeat-service customers, contract accounts, commercial clients, multi-site customers, and any workflow that benefits from consolidated billing.

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