Your customers, set up properly once
A name is all it takes to add a customer. Whatever you then enter on the customer — addresses, payment term, tax, invoice format — appears correctly on every quote and every invoice from then on, without you typing it again.
- Choose file
- Map
- Check & select
- 4Import
Already exists: Kingsway Levenshulme Properties Ltd
Import now
How it looks
Once on the customer, on every document
The first address is the main address and appears on quotes and invoices; you add further ones, and Zirko suggests addresses as you type.
In detail — Once on the customer, on every document
You enter the payment term and early payment discount once on the customer instead of on every invoice — for the one who always wants thirty days. A recipient of its own prints a different address block, for instance when the invoice goes to the property manager and the work was done at the tenant's.
What else it takes off your hands
What they receive, you decide on the customer
Every customer gets a PDF. An e-invoice is produced as well when you choose a format on the customer, or where one is mandatory in their case — then its format is preselected.
In detail — What they receive, you decide on the customer
At the top of the list are the formats of the country your customer is based in. If a detail the format requires is missing, Zirko names it in the dialog you issue the invoice from, before it goes out.
All your contacts in and out in one go
The import reads vCard, Google CSV, Outlook CSV and general CSV in four steps: choose file, map, check, import. Customers who already exist are marked during the check, so no duplicates appear.
In detail — All your contacts in and out in one go
The export always takes all customers along, and with a colour on the customer you filter the list the way your business thinks.
A customer file, not a sales tool
Zirko keeps no sales opportunities and no contact history from your inbox. A request sent through your website does not land in Zirko by itself — you add the customer. And a project is created in the project list, not on the customer: that is where you pick them.
Tax, trades and guides — United Kingdom
This page exists in its own version for every country. Tax rates and trade names come from the same tables the app works with.
Tax on the invoice
An invoice here carries VAT, at a standard rate of 20%. Zirko ships with the country's rates — you don't enter any yourself.
Zirko also carries: 5%.
- Net
- £10,000.00
- VAT 20%
- £2,000.00
- Gross
- £12,000.00
In the United Kingdom, ordinary businesses will have to issue electronic invoices from 01/04/2029.
What the trades are called here
How businesses in this country name their own trade — where there is a page for it, the name leads there.
- Main contractor
- Bricklayer
- Shopfitter
- Carpenter
- Roofer
- Electrician
- Carpenter/Joiner
- Tiler
- Kitchen and bathroom fitter
- Landscaper
- Painter and decorator
- Welder
- Plasterer
- Plumber
From the guides for this country
- Construction Industry Scheme (CIS): 20, 30 or nothing
- CIS invoice: an example, and four lines templates get wrong
- The four VAT positions one UK dwelling can carry
- Invoice for building work: stages, variations, retention
- Trade invoice: the weekly run, in order
- The four clocks a UK plumbing business has to run
Frequently asked questions
What do I need to add a customer?
Just the name. Zirko first asks whether you are adding a person or an organisation; addresses, payment term, tax and invoice format you enter when you need them. If you leave the customer number empty, Zirko assigns one on saving.
Can I bring my contacts over from Outlook or Google?
Yes. The import reads vCard, Google CSV, Outlook CSV and general CSV. You map the columns, check the selection and import; at least name or company has to be mapped. A template to download is included.
Can an invoice go to someone other than the customer?
Yes, through a recipient of its own. That recipient is the address block on the document — the property manager, say, while the work was done at the tenant's. Without one, the document prints the customer's name and main address.
Does every customer get an e-invoice?
No. Everyone gets a PDF; an e-invoice is produced as well when you choose a format on the customer or where one is mandatory in their case. A private customer, added as a person, gets only the PDF in most countries — and lacks nothing as a result.
Is this a CRM?
No. Zirko manages customers the way a business needs them for quote, order and invoice: addresses, recipients, tax, payment term, invoice format and colour. It keeps no sales opportunities and no contact history from the inbox.
What else you can get done
Signature from a distance
The quote as a link to your customer — they sign without an account, and a log records it.More on thisPayment reminders
A friendly reminder and up to five reminder levels, late payment interest at your rate or by law, and automatic if you want.More on thisLanguages
The interface in each person's own language, the document in the customer's.More on this
Before you decide
Hosting
Database and files are held in Frankfurt am Main — including for businesses outside Europe.
How to get started once we launch
No data migration project, no sales call in between: at launch you sign up yourself and get going.
Try the preview
Zirko launches at the end of 2026. Until then you can try an early test version — sign up, confirm your address and you're in straight away. One more email at launch, nothing more.
Available from late 2026