Uku → Fortnox
Invoices
Your team's tracked time and contracts become invoices in Uku. Review, approve, and they land inside Fortnox — header, line items, moms, due date, the lot.
Syncs on every invoice export · Re-sync your client list any time.
Fortnox + Uku integration for Accounting Firms
Practice management for Swedish firms already on Fortnox.
- Bill every minute your team actually worked — automatically
- Your team stops chasing clients. Uku does it on a schedule.
- Track every job, see who's behind, fix it before Friday
Uku finds the 15–30% of revenue your Fortnox invoice can't see.
Your team tracks the work. Uku turns it into invoices Fortnox gets the same day. No spreadsheets, no missed minutes, no end-of-month panic.
What syncs between Uku and Fortnox.
Fortnox holds the books. Uku runs the practice. Here's exactly what moves between them — and which way. No black boxes.
Fortnox → Uku
Clients
Every Fortnox customer lands in Uku, ready for work. One click, no spreadsheet exports.
Fortnox → Uku
Products & services
Your Fortnox articles become Uku billing templates so contracts use your real catalogue.
Fortnox → Uku
VAT codes
Configure moms rates once in Fortnox. Uku stays in sync — no double maintenance.
Fortnox → Uku
Payment status
When Fortnox marks an invoice paid, Uku closes the loop on the same client.
Read-only. You still collect payments in Fortnox.
How it works
10 minutes to set up. The same day to your first invoice.
- 01
Connect Fortnox
Sign in to Fortnox from Uku. Your customer list is in Uku in under a minute.
- 02
Build a contract
Pick the services, set the rates. Uku starts collecting time for you.
- 03
Send the invoice
Review, hit send. It lands in Fortnox — line items, moms, due date.
Fast Client Import
Your Fortnox customers, in Uku in seconds.
One click pulls every customer from Fortnox. Name, email, address, organisationsnummer — in Uku, ready for work.
Customer moved? Address changed? Re-sync any time. Your books and your practice stay in lockstep — without anyone chasing it.
Automated Billing
Automated Data Collection & Invoicing
Build a contract once. Uku pulls in your team's tracked time, fixed fees, and volume entries — and drafts every invoice for you. The work that was lost in spreadsheets gets billed.
Mix time, fixed, volume, and item-based pricing in the same contract. Set minimum time and rounding rules. Your Fortnox VAT codes are already loaded — no double setup.
Invoices to Fortnox
From Uku to Fortnox in 4 clicks.
Review the draft, hit send. Uku pushes the invoice into Fortnox — header, line items, moms, due date, reference. All of it.
Fortnox marks it paid? Uku closes the loop on the same client. No double entry. No reconciliation. No spreadsheets in the middle.
Automated Debt Reminders
Overdue invoices chase themselves.
Fortnox knows which invoices are paid. Uku knows the rest. So Uku sends the reminders — politely, on a schedule you set.
Set up two reminders or five. Different templates for 2, 7, and 14 days overdue. Your team stops chasing money and goes back to actual work.
On schedule
2d Friendly
7d Polite nudge
14d Final notice
Set your own schedule, write your own emails, change the tone any time. Uku runs it. Your team doesn't touch it.
"Uku is simple and intuitive and covers anything we might need from a work management system — from tracking time and managing tasks to billing."
Fortnox integration checklist
Yes, Uku Fortnox integration can do that.
Every Fortnox integration question we hear from accounting firms — and the answer is always the same.
- Can I pull every Fortnox customer into Uku in one click? Yes!
- Can Uku push invoices with line items, moms and references straight into Fortnox? Yes!
- Will Uku read payment status back so my team stops checking two places? Yes!
- Can Uku auto-send polite debt reminders when invoices go overdue? Yes!
- Does it work with Swedish organisationsnummer and moms rules? Yes!
What Scandinavian practice managers say after a year with Uku
38% more customers in just one year
1 year with Uku and we can serve 38% more customers. Couldn't imagine life without Uku."
Annika R.
Chief accountant, Estonia
Increased efficiency and visibility across the team
Uku is simple and intuitive and covers anything we might need from a work management system — from tracking time and managing tasks to billing. It has increased efficiency and visibility throughout our team."
Kersti S.
Lead accountant, Sweden
Accountants actually love working with it
Uku is easy to use and accountants actually love working with it."
Jurgita A.
CEO, Lithuania
Brought our clients closer to the accountants
Uku's team is very helpful in coming up with solutions. In our company, Uku has brought the client closer to accountant while giving both the accountant and management an overview of how much time is spent on what kind of work or communication."
Piret T.
IT Manager, Estonia
The perfect solution for financial services
Uku is the perfect solution for financial services companies unlike any other. Uku team is a pleasure to work with. They're quick to respond and offer adaptations and upgrades to match our needs."
Andzej R.
CEO, Lithuania
The answer to our practice management problems
I'd been looking for a practice management solution for my accounting firm for years. Uku was the answer to our problems."
Christer H.
CEO, Estonia
FAQ
Questions about the Fortnox integration
Uku connects to Fortnox via API. You need a Fortnox plan that includes API access — most mid-tier and higher plans include it.
One-way: Fortnox → Uku. Customers, addresses and organisationsnummer flow from Fortnox into Uku. We deliberately don't push client edits back — your books stay the single source of truth.
From Fortnox → Uku: customers, articles, VAT codes, payment status. From Uku → Fortnox: invoices, line items, VAT codes, due dates, references. The "What syncs" section above shows the full picture.
Connecting Fortnox and importing your customer list takes under 10 minutes. Mapping your services to Uku contracts takes 30–60 minutes depending on how many you have. Our onboarding team will sit on a call with you and do most of it.
No. Nothing leaves Uku until you hit send. There's no background sync running in the dark. You stay in control of every invoice that lands in Fortnox.
Uku reads the status back and updates the matching client and contract. You see paid, unpaid, or overdue without leaving Uku. You still collect payments inside Fortnox.
Still have questions? Contact Us
Get started with Uku today.
Elevate your efficiency with Uku, the powerful yet easy-to-use accounting practice management software.
Try free for 14 days
“Let’s create a dream, where the team is happy, clients are well served and profits are fair.
Rain Allikvee / Uku’s co-founder