Automating accounting for SaaS, apps and subscription businesses: what does a weclapp license with API deliver?

According to the feature table on the weclapp pricing page, all three packages include:

• Creating e-invoices (ZUGFeRD, XRechnung, UBL), capturing incoming e-invoices, OCR for invoice capture
• Payment run, automated dunning run, default interest calculation
• Standard charts of accounts (SKR03, SKR04, Einheitskontenrahmen AT), posting rules, tax matrix
• DATEV export and BMD export

Open item management is part of accounting (“Fibu & Banking” is listed on the Starter card, the other packages say “Everything from ERP Starter”) and is described in the weclapp help. weclapp does not charge document or transaction fees.

The REST API is available from ERP Services upwards, not in Starter. It lets you create invoices from your billing system (Subscription invoices via API).

The API is available with ERP Services and higher; the API token is user-specific. One license is enough for pure API operation; there is no minimum number.

According to its help page (as of 12.12.2025), weclapp supports the payment providers finAPI, Tink, Qwist, Stripe, Klarna and PayPal for retrieving account transactions. According to the weclapp overview (as of 31.05.2024), Stripe and Klarna are experimental and available on request only; the store listing for Stripe (October 2026) announces an expansion. According to the help (as of 31.05.2024), weclapp assigns incoming payments automatically when they match unambiguously; bank import, Tink, PayPal, Qwist and finAPI are named, not Stripe and Klarna. You review unclear cases yourself.

There is no native weclapp standard for bulk payouts from a payment provider (documentation as of 11.10.2026). wals.pro uses Zahlungsabgleich 4 weclapp for this: it breaks bulk remittance advices, for example from Stripe, Mollie, PayPal or American Express, into individual payments and fees and can be extended with further advice sources. Individual payments: Matching subscription payments; payouts in retail: Reconciling payouts.

wals.pro AI 4 weclapp reads your weclapp system and explains settings. It does not change the chart of accounts, tax rules or payment providers today; it only writes to weclapp after a preview and your approval. The Setup Center for connection, skills and the first read access is productive. AI-guided setup of accounting is not available today; we support the functional setup as a project.

On pricing: getting started with wals.pro AI 4 weclapp is free permanently, without credits. Until 31.12.2026 all features are free; after that there are paid tiers based on scope.

Fictional example to plug your own numbers into, not a savings promise: 1,200 active subscriptions, customers in AT and DE, two users.

• Licenses: users × list price (weclapp list price, as of October 2026), net per month. For the two users: 2 × €86 with an annual license, 2 × €95 with a monthly license. You do not need an additional license for API operation.
• Add-on, if weclapp bills the subscriptions itself: €55 per person and month, in addition to the list price: one person €55, two people €110. Without the add-on you create every invoice via API.
• Invoices per month (for API planning, not for costs): subscriptions × billings per year ÷ 12: 1,200 for monthly subscriptions, around 100 for annual subscriptions.
• Not included: Zahlungsabgleich 4 weclapp (price on request), setup, support packages.

In Austria, according to the USP, structured e-invoicing is mandatory only toward the federal government (since 01.01.2014); toward other businesses you may invoice electronically with the recipient's consent, as long as authenticity of origin, integrity of content and legibility are guaranteed. Your tax advisor receives the BMD export. The weclapp help describes the advance VAT return only for ELSTER with Germany as the default country; FinanzOnline is not documented in weclapp (Details).

The German e-invoicing obligation at issuance applies under § 14 (2) sentence 2 no. 1 UStG when the supplying business and the recipient are both resident in Germany. A business is resident in Germany if it has its seat, management or a permanent establishment involved in the supply there (§ 14 (2) sentence 3 UStG; BMF FAQ, question 3). If your company is based in Vienna and has neither management nor an involved permanent establishment in Germany, it is not subject to this obligation as an issuer; if it is merely registered in Germany, it may point this out on the invoice (BMF FAQ, question 3). Your German business customers must nevertheless be able to receive e-invoices since 01.01.2025 (BMF FAQ, question 12). If your German business customer owes the tax under § 13b UStG (reverse charge) and you have neither a seat, management nor an involved permanent establishment in Germany, the invoice is governed by the rules of your home state Austria (§ 14 (7) UStG), unless the customer settles by self-billing (credit note procedure). Austria then requires the invoice by the 15th of the following month, showing both VAT IDs and a note that the recipient is liable for the tax, without a separate tax line (§ 11 (1) no. 2, (1a) UStG 1994). This does not apply to private customers in Germany (OSS). This does not replace tax advice.