How to Set Up Recurring Invoices and Save Hours Every Month

If you bill monthly retainers, subscriptions, or anything where the same client pays the same amount on a regular schedule, you're probably spending way too much time creating nearly identical invoices. Same client. Same amount. Same line items. Only the date changes.

This is where recurring invoices come in. You set them up once, and your accounting software generates them automatically on your schedule. It's one of the fastest ways to save hours every month—while actually improving your cash flow.

What are recurring invoices?

A recurring invoice is an invoice that your accounting software creates automatically at set intervals: weekly, monthly, quarterly, whatever makes sense for your business. Each generated invoice is a new, standalone document with its own number and date. The content—client, line items, amounts—stays the same.

They're ideal for:

• Monthly retainers
• SaaS or subscription services
• Maintenance contracts and support
• Rental income
• Ongoing consultancy work
• Any billing arrangement that repeats on a schedule

Why recurring invoices save you time (and money)

The time saving is real

Imagine sending 20 invoices every month. Even at five minutes each, that's over 90 minutes of manual work—work that doesn't move your business forward. Recurring invoices reduce that to zero ongoing effort after you set them up once. Over a year, that's roughly 18 hours you get back. For a small business owner, that's not nothing.

Consistency beats manual work

When you create invoices by hand, you introduce friction. Wrong amount, missing line item, formatting that doesn't match last month. Recurring invoices are pixel-perfect identical every time, which means fewer errors and fewer emails saying, "Did you mean £5,000 not £500?"

Faster payment equals better cash flow

Here's the part that actually matters: invoices that go out on time get paid faster. When invoicing is manual, it's easy to procrastinate (especially on a Monday morning when there are a hundred other things). Recurring invoices never skip a beat—they go out automatically on the 1st of the month, or the 15th, or whenever you've set them.

Under UK late payment legislation, the clock starts from the invoice date. Delays in issuing cost you real money. With recurring invoices, you never have to worry about that.

Predictable cash flow

When invoices go out on a consistent schedule, your inflows become predictable. You know exactly when to expect payment (assuming your clients pay on time), which makes cash flow forecasting dramatically more accurate. That's the difference between wondering if you can make payroll and knowing you can.

How to set up recurring invoices (in 5 steps)

Step 1: Audit your billing arrangements

Start by listing every client and service that follows a regular pattern. For each one, note:

• Client name and billing details
• Invoice amount (or how it's calculated)
• Billing frequency (weekly, monthly, quarterly)
• Start date
• End date (if there's a contract term)
• Payment terms (Net 30, etc.)
• Any known variations (annual price increases, seasonal adjustments)

This takes an hour at most. It's worth doing once because you'll refer back to it.

Step 2: Build your template

In your accounting software, create a recurring invoice template. Include:

• Client details — pulled from your client record, pre-populated
• Line items — description, quantity, unit price, tax rate
• Payment terms — the terms you've agreed with the client
• Notes or references — any standard messaging that goes on every invoice
• Frequency — monthly, quarterly, weekly, whatever
• Start date and end date — when the cycle begins and (if applicable) when it stops

If you're using Relentify's Accounting tool, the template creation is straightforward. You fill in each field once, and the system handles the repetition.

Step 3: Choose your automation level

Most accounting software gives you two options:

Fully automatic — The invoice is created and sent to the client without you seeing it first. This is the fastest and works beautifully for fixed-amount billing (monthly retainer, that's it).

Draft mode — The invoice is created as a draft for your review before sending. You get a chance to glance at it, tweak if needed, then hit send. This is the safer option if amounts occasionally vary or you like to add notes.

We recommend draft mode for most small businesses. It takes 30 seconds to review and send, and it gives you a safety net.

Step 4: Add payment reminders (the thing people forget)

A recurring invoice is only half the job. Pair it with automated reminders:

• Reminder 1: Five days before payment is due
• Reminder 2: One day after the due date (if payment hasn't arrived)

This creates a complete automated cycle: invoice (automatic), remind (automatic), follow up (you, if needed). The invoicing part is now on autopilot.

See our post on how to chase late invoices for more detail on this step.

Step 5: Review quarterly, not monthly

Recurring invoices are not "set and forget"—or rather, they can be, but you shouldn't. Review them every three months:

• Are amounts still correct?
• Has a client's arrangement changed?
• Are there new clients who should be on recurring billing?
• Are there old, inactive recurring invoices that should be stopped?

This takes 15 minutes and prevents billing mishaps down the road.

Handling the messy cases

Price increases

When you raise your rates, update the recurring invoice template before the next cycle. Notify the client in advance (you're not trying to surprise them), and make sure the new amount kicks in from the right date.

One-off additions

A recurring client needs an extra service one month. You have two choices:

1. Add it to the next recurring invoice (modify the draft before sending)
2. Send a separate, one-off invoice

Most of the time, a separate invoice is cleaner. It keeps the recurring template unsullied and the extra item clearly identified. See our guide to invoice payment terms if you want to adjust terms on that one-off.

Variable amounts

If billing varies every month (hourly work where hours change, usage-based pricing), full automation won't work. Use draft mode instead—you input the hours or usage, the system calculates the amount, and you send.

Some platforms (including Relentify's Accounting tier) can calculate amounts dynamically based on data you input each cycle, which is a nice middle ground between manual and fully automatic.

Pausing temporarily

If a client pauses their service, pause the recurring invoice rather than deleting it. This preserves your template, and when they restart, you're ready to go.

Tax and compliance

Recurring invoices are taxed exactly like regular invoices. Each generated invoice includes the right tax calculation based on your rates. If you're VAT-registered, every recurring invoice must still meet HMRC's VAT invoice requirements—tax point, VAT number, the lot. Nothing changes.

If tax rates change (VAT moves from 20% to 23%, for example), update the template, and the change applies to all future invoices.

How recurring invoices fit into your wider accounting

Bank reconciliation becomes almost automatic

When recurring invoices are paid by standing order or direct debit, your bank feed matches them automatically. Same amount every month, same date—a few clicks and you're done reconciling.

Cash flow forecasting gets realistic

If you have 15 recurring invoices totalling £8,500 a month, you can forecast £8,500 in inflows with confidence (adjusted for your collection rate). That's the anchor that makes forecasting work. See our guide to financial reports for more detail.

Client statements are cleaner

Recurring invoices appear on client statements just like regular invoices, giving clients a full record of all charges and payments. No mystery, no confusion.

Best practices for recurring invoices

Set start dates and end dates. Always. If the contract runs 12 months, set an end date. This prevents orphaned invoices after a contract ends.

Use clear line descriptions. "Monthly retainer—March 2026" beats "Services." Your client should know what they're paying for without having to email you.

Review once a year, minimum. Check that prices are current, inactive clients are removed, and your templates match your current offerings.

Tell clients what's coming. When you set up a recurring invoice for a new client, mention that they'll see an automatic invoice on the 1st of each month (or whenever). Sets the expectation and avoids surprises.

Link it to your payment workflow. If you're automating invoicing, automate your payables side too. Most of the firms we work with find that automating one side of the ledger naturally leads to automating the other.

Frequently Asked Questions

Q: Can I use recurring invoices for variable amounts?

A: Yes, with draft mode. You set up the template, the system generates the draft with a base amount, you update the hours or usage, and send. Some platforms (like Relentify) can even auto-calculate amounts based on data you input each cycle.

Q: What happens if I need to change an amount mid-month?

A: In draft mode, you simply change it before sending. If you're on full automation, you modify the draft, send it, and update the template for next month. No big deal.

Q: If a recurring invoice is late one month, does the whole schedule shift?

A: No. The schedule stays fixed. If an invoice is supposed to go out on the 1st and you manually send it on the 3rd, the next one still goes out on the 1st of next month. The schedule doesn't drift.

Q: Do recurring invoices work for international clients?

A: Yes, though you'll want to handle multi-currency carefully. See our guide on multi-currency invoicing for the details. Recurring invoices can be set up in any currency your platform supports.

Q: How do I handle a contract that ends mid-month?

A: Set an end date on the recurring invoice. Most accounting software will generate the last invoice on schedule, then stop. If you need to send a final partial invoice (prorating the last month), you'd send that as a one-off after the recurring series ends.

Q: Can I have multiple recurring invoices for the same client?

A: Absolutely. One client might have a £500 monthly retainer (one recurring invoice) plus a £100/month add-on service (second recurring invoice). Set them up separately and they'll both run on their own schedules.

Q: What if my client doesn't pay on time? Do I lose the benefit?

A: The invoicing is still automated; the payment is still their responsibility. Set up payment reminders (automatic emails five days before due and one day after due) to nudge them along. The time savings come from automating the invoice part, not guaranteeing payment.

Wrap up

Recurring invoices are one of those small automations that compound quietly over time. What saves you an hour in month one saves you 12 hours in year one. For any business with regular, repeating billing, they're one of the easiest wins available.

If you're managing this in a spreadsheet or sending manual invoices every month, it's time to move on. Accounting software like Relentify makes recurring invoices straightforward: set them up once, choose your automation level, add reminders, and let them run. Your future self—the one who reclaims those 18 hours a year—will thank you.

Try Relentify's Accounting tier free for 14 days. No credit card required.