Invoicing
Get paid without chasing anyone.Finn sends the reminders and spots the payment.
Raise an invoice in the app or ask Finn on WhatsApp. Finn chases late payers in your words, on your schedule, and marks the invoice paid the moment the money lands in your bank.
14 days free, no card. Then £20/month, invoicing included.
How it works
From the ask to the money, Finn runs the loop.
- 01
Ask for it
Say who, what and when, in the app or on WhatsApp. Finn drafts the invoice with your logo and bank details. Or build it yourself in the app.
- 02
Send it
Check it and hit send. Your client gets the PDF by email, and you can download a copy any time.
- 03
Let Finn chase
If it runs late, Finn sends reminders on the days you pick, friendly first and firmer later, in words you set once. Change it for a single invoice whenever you like.
- 04
Get paid
When the money lands in your connected bank, Finn matches it, marks the invoice paid and stops the reminders. Part-paid invoices keep being chased for the rest. If a match is not certain, Finn asks you.
Raise it anywhere
Invoice from the car park.
Tell Finn who to bill in WhatsApp, Slack, Telegram, email, on a phone call or in the app. Finn finds the client, works out the VAT and drafts the invoice with your logo and bank details. You check it and hit send.
- Plain English: "Invoice Acme £4,000 + VAT for the September retainer, 30 days"
- New client? Finn adds them to your contacts as it goes
- Prefer forms? Build it in the app with line items, currency and payment terms
- Your client gets a PDF by email. Download a copy any time
Chasers
Reminders that sound like you.
Nobody likes writing "just following up". Finn sends the reminders for you, starting on the due date and getting firmer the longer an invoice is late. Set the words and the days once, and change them on any invoice.
- Four steps: a due-day reminder, then friendly, firm and final
- Pick a schedule (gentle, standard or firm) or choose your own days
- Write each message yourself, with the client's name, amount and due date filled in
- Chase one invoice now from chat, or switch chasing off while you sort it out
Paid
Paid the moment it lands.
When a payment arrives in your connected bank, Finn works out which invoice it pays, marks it paid and stops the reminders. No ticking things off, no reminder going to a client who already paid.
- Starling, Revolut, Wise, Mercury and Qonto sync every day, so payments match overnight
- Uploading a bank statement instead? Finn matches from that too
- Part payments are recorded, and Finn keeps chasing the rest
- If Finn is not sure which invoice a payment is for, it asks you
Also included
Everything else getting paid needs.
Recurring invoices
Weekly, monthly, quarterly or yearly. Finn raises and emails each one on schedule.
Quotes to invoices
Send a quote, then turn it into an invoice in one click when the client says yes.
Any currency
Invoice abroad in the client's currency. Your books record the value at the invoice-date rate.
Credit notes
Raise a credit note against any invoice in one click.
Unlimited invoices
No cap and no per-invoice fees. It is all in the one monthly price.
In your books already
Every invoice and payment lands in your accounts and your VAT return, with nothing to re-key.
The price
No invoice cap. No upgrade to get one.
On Xero's cheapest company plan you can send 20 invoices a month before you have to move up to £39. AccountsOS is £20 with no cap, and Finn's chasing and payment matching are included.
Xero UK list prices excluding VAT, read on xero.com on 22 September 2026.
FAQ
Invoicing: common questions
Can I send an invoice from WhatsApp?
Can I change what the reminders say and when they go?
How does an invoice get marked as paid?
What if the client only pays part of it?
Can I add my logo and bank details?
Do invoices go into my accounts?
Send the invoice once. Finn gets you paid.
Try it free for 14 days, no card needed.