Recurring Invoices: Automate Your Retainers and Subscriptions

If you bill the same client the same amount every month, a recurring invoice removes the manual work and keeps cash flow predictable.

What to automate

Retainers, subscriptions, hosting and maintenance contracts are perfect candidates for recurring invoices. The amount, the client and the interval are stable, so there is nothing to rethink each period.

Set the amount, the currency and the interval once, and let the system generate the rest. A well-configured recurring invoice needs no human touch between creation and sending.

Choose the interval that matches the contract: monthly for retainers, quarterly for support, annually for licences. The interval is part of the agreement, so it should be fixed and consistent.

Also fix the day of the month the invoice is sent. A consistent issue date makes the client’s own accounts predictable and reduces the chance of a payment slipping.

• Set the amount, currency and interval once.
• Fix the day of the month the invoice is sent.
• Keep the same invoice number sequence.

Keeping the numbering correct

Recurring invoices still need consecutive, unique numbers. Each generated invoice takes the next number in your normal sequence, just like a manually created one.

Do not reuse a single number for a recurring series. Every occurrence is a separate invoice and must have its own number, even though the content is identical.

If you restart numbering each year, the recurring series simply picks up the new prefix on 1 January. The automation should follow your scheme, not fight it.

A recurring series that keeps numbering consistent gives you an unbroken audit trail across every period the retainer ran, which is exactly what a tax office expects.

What still needs attention

Even automated invoices need a human check when rates or VAT change. Review recurring templates whenever a rate or tax rule is updated so you do not bill the old amount for months.

VAT rates change occasionally in Switzerland. When a rate changes, every recurring template carrying VAT must be updated, or you will under- or over-charge across the whole series.

Check that the client’s details are still current. Addresses and billing contacts change, and a recurring invoice is only as good as the data it is generated from.

Watch for contracts that end. A retainer that has been terminated must stop generating invoices, so set an end date or a review point when you create the series.

Setting it up well

Start each recurring series from a correct, finalised invoice. Using a live invoice as the template means the recurring copies inherit all the right details from day one.

Give the series a recognisable label, such as the client name and service, so you can find and review it quickly when something changes.

Set the series to send automatically only if your cash flow relies on it. Otherwise generate the drafts and send them after a quick glance, which is still far faster than creating each one by hand.

facturio lets you duplicate any invoice as a starting point for a recurring series, so your templates stay consistent and your numbering stays consecutive without extra work.

• Build each series from a correct, finalised invoice.
• Review templates when VAT rates or client details change.
• Set an end date or review point for each series.
• Let the automation keep the numbering consecutive.