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Smallinvoice Accounting Sync for WooCommerce — orders into Smallinvoice invoices
Smallinvoice connection Queue Order box
WooCommerce

Smallinvoice Accounting Sync for WooCommerce — orders into Smallinvoice invoices

WooCommerce orders into Smallinvoice invoices.

Download Free
Pro · one-year licence Staging copies are included. The more sites, the cheaper each one
Compatibility
WordPress 6.2+ · WooCommerce 8.0+ · PHP 7.4+ · HPOS · English, Deutsch
Licence
a site + a staging copy, annual
Trial
7 days, no card, one per site
Updated
November 2026
Or all 394 Pro modules with All Access — 4 990 ₴ / year ≈ €98

What Free has,
and what Pro adds

The free version works with no time limit. Pro adds the rest of the features in the table.

Feature Free Pro
A Smallinvoice customer and invoice from an order ✔ ✔
Swiss VAT rates and a unit ✔ ✔
A queue with retries and a "Send again" button ✔ ✔
A retry never makes a duplicate ✔ ✔
Buyer e-mail — ✔
Payment — ✔

What it looks like

Smallinvoice connection
Connection: the secret is stored encrypted and never printed back.
Queue
Queue: a stopped document with the reason and “Send again”.
Order box
Order box: the invoice is sent.

Key points

What the free version does

You paste the client ID and secret (the client-credentials grant), the connection shows the account name, in “Mapping” you link the WooCommerce rates to the Smallinvoice rates and pick a unit from their list.

What Pro adds

An e-mail with the invoice from Smallinvoice itself to the buyer and a payment on the invoice for a paid order (cash on delivery is recorded when the order is completed).

How much it costs

The base version is free. Pro costs 1290 UAH for a one-year licence. A year of updates, technical support and all Pro features.

The trial starts when you ask

A fresh install is the free version, nothing switches on by itself. The “Try Pro for 7 days” button → e-mail → the key right in the window and by e-mail.

One key — a site and a staging copy

Moving the site? Unlink the licence on the old domain and activate it on the new one yourself. A staging copy (staging., dev.) works with the same key and does not take a site slot. For studios — keys for 5 or 25 sites, or unlimited.

Technical requirements

  • WordPress 6.2+, WooCommerce 8.0+, PHP 7.4+.
  • A Smallinvoice account with an API V2 client.

Version history

v1.0.0 Current November 2026

Invoices from orders, customers, Swiss VAT, a queue.

Frequently bought with Smallinvoice Accounting Sync

All Access Need more? All modules (394) under one licence, new ones are added automatically. 4 990 ₴≈ €98 Learn more →

Full module description

CatCode Accounting Sync with Smallinvoice for WooCommerce creates a customer with an address and an invoice in the Swiss service Smallinvoice from every order: the Swiss VAT rates (8.1, 2.6, 3.8), a unit and an “Order …” note. Smallinvoice has no connector of its own for WooCommerce.

This module has never run against the real Smallinvoice. We had no Smallinvoice account or API client, so nothing was ever sent to Smallinvoice.

What the free version does

You paste the client ID and secret (the client-credentials grant), the connection shows the account name, in “Mapping” you link the WooCommerce rates to the Smallinvoice rates and pick a unit from their list. An order in the chosen statuses goes into a queue: the customer (company or private person) and an invoice with the order total, set to “sent”. A retry or a failure makes no duplicate and a stopped document shows in the queue with a “Send again” button.

What Pro adds

An e-mail with the invoice from Smallinvoice itself to the buyer and a payment on the invoice for a paid order (cash on delivery is recorded when the order is completed).

How it works, step by step

  1. In Smallinvoice (Home → Users → API V2) create a client with the client-credentials grant and the scopes profile, contact, catalog and invoice.
  2. Paste the client ID and secret and choose the order statuses.
  3. In “Mapping” link the VAT rates and pick the unit.
  4. Move one order to the chosen status and check the invoice.

Under the hood

  • The secret is stored encrypted; documents go through an Action Scheduler queue with retries; every invoice carries a reference to the order so no duplicate is made.

How to install

  1. Plugins → Add New → Upload Plugin: choose the zip and activate it.
  2. WooCommerce → Accounting Sync: client ID and secret.
  3. Enter the service credentials and test the connection.
  4. Try one test order before you switch the automation on.

The module is not on wordpress.org yet: the free version and Pro are one archive from this page. Without a key it works as the free version.

Questions
about the module

Didn't find the answer? Message us on Telegram and we'll reply within a business day.

@catcode_support Setup, compatibility, activation
Is this an official Smallinvoice plugin?

No. Smallinvoice has no WooCommerce connector; we made the module, and the Smallinvoice trademark belongs to its owner.

What happens after the trial?

Pro switches off, the free part keeps working.

Not quite what you are looking for?

We build custom modules for WordPress, WooCommerce, OpenCart and Shopify. Tell us about the task and we'll prepare an estimate.

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