Tax Software

ADDISON (Wolters Kluwer): features, pricing and who it fits

Checked November 2, 2026 · wolterskluwer.com

Full practice suite for German tax firms, sold as an alternative to DATEV, with Steuern, Rechnungswesen, Lohn and a digital Akte. ADDISON OneClick is the client portal. Prices are not published, so you contact the vendor for a quote, and the suite comes as cloud, on-premises or app.

Who ADDISON (Wolters Kluwer) is for

Best for

Steuerkanzleien that want a single suite for Steuern, Rechnungswesen, Lohn and document file (Akte)
Firms that want a client portal (OneClick) with receipt submission and client-side time tracking
Firms of any size, vendor positions it as software for every Kanzleigröße

Look elsewhere if

Buyers who need public prices or an instant online sign-up (prices not published, contact required)
Firms that want a pure client-portal add-on rather than a full suite
Anyone looking for a DIY tax filing tool for their own return

ADDISON (Wolters Kluwer) features

Tax market: Germany; software for Steuerberater and Steuerkanzleien (tax firms), not for individual taxpayers
Self-employed return support: Not applicable as a DIY product. Firm software that prepares returns for clients including Selbstständige (module scope not confirmed by the vendor)
Business entity returns: Suite covers Steuern, Rechnungswesen/Finanzbuchhaltung, Jahresabschluss and Controlling for firm clients; detailed return coverage not confirmed by the vendor on the vendor page
Data import: Interfaces listed by tax & bytes: sevDesk, GetMyInvoices, Clockodo; digital Belegworkflow and automated booking. Vendor has a heading on cooperation with DATEV-using firms; interface details not confirmed by the vendor
Expert or Steuerberater help: Not applicable (firm software). Vendor offers its own training academy (akademie.addison.de) and support
Tax firm workflows: Client portal: ADDISON OneClick (Belege submission, Auswertungen, apps). Document management: ADDISON Akte (digital Steuerakte). Time tracking: Zeiterfassung via OneClick app (Android, iOS, desktop) for clients' staff, per Wolters Kluwer; Clockodo interface for firm time tracking. Payroll: Lohn Online incl. eAU. Deadlines/tasks and a native DATEV interface not stated on pages seen. Billing/Honorar module not confirmed by the vendor
Pricing model: Quote only, no published prices
Target company size: Steuerkanzleien of any size; vendor says about 6.000 Steuerberater and 14.000 Mittelstandskunden use ADDISON

Integrations, security and hosting

Security and compliance: Servers in Germany, EU server location, 2-factor authentication, off-site backups, DSGVO compliance (tax & bytes listing)

Worth knowing before you buy

Offered as cloud, on-premises (Lokal) and app; servers listed in Germany
Prices are not public, no listed free trial
ADDISON OneClick won a German Stevie Award in March 2021 (vendor press release)
Time tracking for the firm is via a Clockodo interface; OneClick Zeiterfassung is aimed at clients' employees
OMR Reviews lists the product under Tax Practice Management with 0 reviews

ADDISON (Wolters Kluwer) alternatives

Vendor dossier

Fit by company size

Category	1-10 people	11-50 people	51-500 people	500+ people
Tax Software	Workable	Workable	Workable	No data

Strong fitWorkablePoor fitNo data from the vendor

How buying ADDISON (Wolters Kluwer) works

How you buy: Through sales
Demo or quote needed for: All products (prices not published)

Security and data protection

Data hosting regions: Germany, EU

From ADDISON (Wolters Kluwer)'s trust center, security and legal pages. Anything not listed is not published.

About the company

Headquarters: Germany
Ownership: part of Wolters Kluwer
2021: ADDISON OneClick wins German Stevie Award

Support and integrations

Notable integrations: sevDesk, GetMyInvoices, Clockodo, edtime, Pleo

What vendors in this category ask before quoting

Answer these once in a SaaSBid request and ADDISON (Wolters Kluwer) and its alternatives quote against the same facts.

Which country will the return be filed in, and are you also filing in a second one?Tax software serves one market, so a two-country setup usually needs two products.
Are you a sole proprietor, freelancer, LLC, partnership or corporation?Entity type decides which edition and which forms are required.
Is your VAT or Umsatzsteuer status small-business exempt or regular?Some German products cover only exempt or simple cases and treat VAT-liable users separately.
How many returns and how many states or businesses do you need to file?Per-state fees and limits on returns per license change the total price.
Do you want a person to review or prepare the return, or only software?Expert tiers cost more and can be priced per entity or as a share of a refund.
If you run a tax firm: how many clients and staff do you have, and do you keep DATEV?Client bands, included users and the DATEV interface decide which plan and which add-ons are needed.