Invoicing for builders
Get your evenings back.
Stage payments, variations and the final account, without the spreadsheet.
Quote the extension, invoice each stage as it is reached, add the variations as you go, and see exactly who owes what. Your accountant gets it all in Xero or QuickBooks.
Get the app for your phone
- Free first month, no card needed
- Then £14.95 a month per business
- UK VAT included, cancel any time
Drafts invoices from your emails with
Claude
ChatGPT
Copilot
Marsden Building Services
Bolton · 07700 900890
Invoice
INV-0042
Due in 14 days
Pay by cardPay by bankOpened twice
Last seen 10 minutes ago
Made for builders
The bits of the job you do not get paid for, done
Quote, deposit, stages
An approved quote becomes the first invoice in one tap, and each stage after it is a copy with the next line on it.
Who owes what
Customer statements, ageing and profit and loss reports, so the final account is a report, not a Sunday with a calculator.
Your team on the same account
Site manager, office and bookkeeper each get a login with the right permissions.
Pay by card or bank from the invoice
Stage payments go straight to your own account from a link on the invoice.
How it works
Three steps. That's it.
- Step 1
Send the invoice
Pick the client, add the job, press Send. It goes by email or WhatsApp with your logo on it.
- Step 2
Your client pays
One tap to pay by card or bank from the invoice. The money goes to your own account.
Step 3Your books are done
Invoices and payments flow into Xero or QuickBooks. Nobody types anything twice.
Use ChatGPT or Claude?
Tell it what the job was. It drafts the invoice.
Connect your assistant to Kwikbill once. Then type a line like the one here and it drafts the invoice for the right customer, with your prices on it. You check it and press Send. It cannot send anything without you.
How to connect an assistantYou:
“invoice Mr Whitaker £8,500 for stage two”
Assistant:
Drafted. Here is the link to check it before it goes.
Features
Everything a small business needs to get paid
Built for trades, freelancers and the bookkeepers who look after them. Every feature is included with every business; there are no tiers to compare.
Pay by bank and card
Clients pay from the invoice page: by bank through GoCardless at 1.4% + 20p a payment, or by card through Stripe at 2.4% + 20p for UK cards. The money goes straight to your own account, and with your bank connected, transfers that arrive mark their invoices paid on their own.
Know when it has been seen
Every time a client opens an invoice it is counted and timestamped, and email opens are tracked too. It is on the invoice list, on the invoice itself and in the activity feed, so there is no more “I never got it”.
Share on WhatsApp
Send an invoice, quote, reminder or payment link to a client's WhatsApp in one tap. It opens WhatsApp with the message and link filled in, from your own number.
Quotes that turn into invoices
Estimates with approve and decline buttons for the client, deposit requests, and one click to convert an approved quote into an invoice.
Recurring invoices and reminders
Repeat invoices on a schedule you set, and automatic payment reminders before and after the due date, with the wording you choose.
Reports and VAT
Fifteen reports, a VAT return summary, customer ageing, profit and loss, and CSV exports your accountant can open.
Your team, included
Unlimited team members with owner, admin, staff and viewer roles. Run more than one business from the same sign-in.
An API for everything else
A documented REST API, signed webhooks for “invoice paid” and “invoice viewed”, and an OpenAPI document, for Zapier, Make, n8n or your own code.
Pricing
One price, everything included
A free first month with no card needed, then one monthly price per business with UK VAT included. Cancel any time.
Per business
£14.95a month, VAT included
Free first month, no card needed. Nothing is charged until you choose to carry on; then £14.95 a month per business, and you can stop whenever you like.
- Unlimited invoices, quotes, clients and team members
- Pay by bank and card, with the money paid to your own account
- Viewed and opened tracking, WhatsApp sharing, reminders and recurring invoices
- Claude and ChatGPT connections, the API and webhooks
- Reports, VAT return summary, imports and exports
Pay less
- £9.95a month, for good, once a friend you referred subscribes
- £9.95a month for your friend's first three paid months
- 10%, 15% and 20% offyour 2nd, 3rd and 4th or later business
When you stop paying
Cancel from Settings → Subscription, or simply let the free month end. Your business becomes read-only: you can still sign in, view, search and download everything, and subscribing again switches it back on.
Card and bank payment fees are all-in rates charged per payment, Kwikbill's share included, and are not part of the subscription. Full details are in the terms of service.
Questions