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About us

Bookkeeping from Hamburg, digital throughout Germany

GKM Buchhaltung is a bookkeeping firm in Hamburg, founded and run by Gagik Kreuz. We handle bookkeeping and payroll for small and medium-sized businesses, clear backlogs, and advise on business management. Tax work is handled by your own tax advisor or a tax advisor we work with.

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Gagik Kreuz, founder and managing director of GKM Buchhaltung
Gagik KreuzFounder and managing director · GKM BuchhaltungConsultation in German, English and Armenian

Gagik Kreuz meets the requirements of § 6(1) no. 1 StBerG.

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Background

Gagik Kreuz

Mr. Kreuz founded GKM in 2022 and has been leading the company ever since. He studied business administration at the Hochschule für Technik und Wirtschaft Berlin. He then completed his master’s degree in Industrial Sales and Innovation Management there and went on to work in sales.

Since 2023, he has worked closely with tax advisors, and today he does so every day. He combines his business administration background with experience in sales and from starting his own business.

Milestones

  1. Education

    Business administration at HTW Berlin

    Bachelor’s degree program, completed in five semesters instead of seven. Specializations in investment and finance as well as banking, plus courses in accounting, entrepreneurship, small business management, and corporate taxation.

  2. Education

    Tutor in accounting

    For one year, he served as a tutor for students in the accounting course.

  3. Education

    Semester abroad in Mexico

    One semester at the Tecnológico de Monterrey in Guadalajara.

  4. Education

    Industrial Sales and Innovation Management

    Master’s degree from HTW Berlin, successfully completed. Through this program, he specialized in sales.

  5. Career

    Sales

    Afterward, he worked in sales.

  6. 2022

    Started his own business

    Alongside his job, he founded GKM. So he knows first-hand what it takes to start a business.

  7. 2023

    Working with tax advisors

    A major contract was the deciding factor in moving fully into consulting and working with tax advisors. For a tax advisor with whom he worked closely, he prepared the documents for several annual financial statements. The tax advisor prepared the financial statements themselves.

  8. Today

    Bookkeeping and consulting with GKM

    Since then, he has been working with this and other tax advisors every day. GKM handles bookkeeping and payroll for small and medium-sized businesses and provides them with business management consulting.

01

Understanding industries

We know which receipts, payment methods, and payroll rules come with your industry, and we set up your bookkeeping accordingly.

02

Preparing for the tax advisor exam

Gagik Kreuz is preparing for it. Understanding the tax background of an entry helps us record it in a way the tax advisor can work with. Assessing the tax treatment remains the tax advisor’s responsibility.

03

Accurate bookkeeping

We reconcile the books every month. We resolve any discrepancies before the figures are sent to the tax advisor.

For you

What you get out of it

Accounting records your tax advisor can work with

From our experience working with tax advisors, we know what their firms need for advance VAT returns and annual financial statements. We reconcile the books every month and provide well-organized documentation.

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Numbers with a business perspective

Mr. Kreuz specialized in investment, financing, and banking during his studies. Upon request, we’ll review your financial reports, plan your cash flow, and prepare financial data for meetings with your bank.

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Starting a business, from personal experience

Mr. Kreuz has started his own business. He provides business management support to founders, from the business plan to the first bookkeeping entries.

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Industries

Industries we know from client work

From keeping the books for these industries, we know their typical receipts, payment methods, and payroll questions. We also know what the tax advisor needs from the bookkeeping at year-end.

All industry pages

Our approach

How we work

01

Careful

We reconcile the books every month. We resolve any discrepancies before the records go to the tax advisor.

02

Transparent

We state the price up front in your quote. We clearly explain what we’re authorized to do and what the tax advisor handles.

03

Digital

Receipts, reports, and contracts are handled through the client portal. Paper documents are the exception.

04

Available

You have a dedicated point of contact. In Hamburg, we also come to you.

Partner tax advisor

What matters when working together

For advance VAT returns, financial statements, and tax returns, we work with tax advisors: either our partner tax advisor or your own. Here’s what we keep in mind:

  • Licensed tax advisors: Tax matters are handled only by tax advisors appointed by a chamber of tax advisors.
  • DATEV: The data flows directly between us and the firm without any detours.
  • Digital: Documents and appointments are handled digitally; in-person meetings are scheduled when necessary.
  • Availability: dedicated points of contact and responses within a reasonable time.
  • Your industry: We discuss your industry and its specific characteristics during the initial consultation and pass this information on to the tax advisor.
  • Direct engagement: You engage the tax advisor directly, with your own contract and billing.

The initial consultation and the introduction are free.

Find a tax advisor Working with your tax advisor

Commitments

What’s settled in advance

  • Price before we start: You’ll receive a binding quote upfront. No surprises on the invoice.
  • Switch even mid-year: We’ll take over from the current month and work through any backlogs at the same time.
  • Your data remains yours: When the contract ends, we hand over your bookkeeping in an orderly manner to you or your new advisor. If the books were kept in a tax advisor’s DATEV records, we do this together with them.
Overview in the client portal with sample data: a document for signature, new documents from GKM, and the upload of receipts
Your client portal, shown here with sample data

Client portal

Working together via the client portal

In the client portal, you sign contracts, upload receipts, and view reports. We collect any questions there instead of sending them via email for each individual receipt.

We offer consultations in German, English, and Armenian. The website and the client portal are available in several languages. You receive contracts in German and English, invoices in German or English.

Security

  • Optional two-factor sign-in
  • Encrypted transmission
  • Logins, signatures, and data retrievals are logged
  • Data stored in the EU, contract under Art. 28 GDPR
  • Confidentiality, even after the contract ends

Contact

Let’s talk about your bookkeeping.

During our initial consultation, we’ll determine what your business needs. Afterward, you’ll receive a binding quote via email.

Request a quoteSchedule a callback
Phone
+49 40 2989 6395
Monday to Friday, 9 am to 8 pm
Email
info@gkm-buchhaltung.de
Reply within one business day
Office
Gerhofstraße 1–3
20354 Hamburg