What is the main business of MMK?

The main business activity of MMK focuses on accounting, bookkeeping and auditing activities; tax consultancy.

When was the company founded?

The company was registered in the Polish National Court Register (KRS) on December 1, 2017.

Where is the headquarters located?

The headquarters is located at: ul. Stanisława Mikołajczyka 21, 03-984 Warszawa.

Who is on the management board?

The management board includes Marek Michał Korczak (President of the Management Board).

What is the share capital?

The share capital of the company is PLN 5,000 (approx. $1,351).

What period do the latest financial data cover?

The latest available financial statement covers the period from January 1, 2025 to December 31, 2025.

What was the revenue?

The company reported a revenue of USD 21,296 in 2025, which is a decrease of 36.8% compared to 2024.

No, in 2025 the company reported a net loss of USD 874.

Which cost dominates operating expenses?

The largest operating cost category falls under employee remuneration. This category amounted to USD 9,662 in 2025, representing 44% of all operating expenses.

MMKsp. z o.o.

Accounting, bookkeeping and auditing activities; tax consultancy

KRS: NIP: REGON:

Overview

Status

Active

Registry date

2017-12-01

Share capital

5,000.00 PLN

Registered address

ul. Stanisława Mikołajczyka 21/44, 03-984 Warszawa, Poland

Financials

Revenue history (in k)

Filing timeliness

4 of 6 financial statements were filed late (the longest delay 240 days for 2024).

202529/10/2026
202412/03/2026
202303/10/2024
202210/07/2023
202125/09/2022
202006/10/2021

Filed on timeDelayFiling deadline

Data and insights are generated automatically from financial statements – they may contain errors and are neither a credit assessment nor business advice.

Statistics

How the company ranks by revenue within its industry, region and across Poland in 2025.

Results vs industry

Revenue

This companyUSD 21.30kMedianUSD 82.63kAverageUSD 478.39k

Net profit

This companyUSD -873.60MedianUSD 6.27kAverageUSD 42.76k

Operating costs

This companyUSD 22.15kMedianUSD 69.75kAverageUSD 417.95k

Assets

This companyUSD 12.25kMedianUSD 46.59kAverageUSD 356.02k

Industry

Authorized Representatives

Michał Łukasz Korczak – Management Board Member

Marek Michał Korczak – President of the Management Board

Manner of representation

Each member of the management board is authorized to make declarations on behalf of the company independently.

Ownership

Owner	Shares	Share value	Stake
Marek Michał Korczakage 35	50	$675.31	50%
Michał Łukasz Korczakage 32	50	$675.31	50%

Marek Michał Korczak and Michał Łukasz Korczak hold a combined 100% – the ownership structure indicates family control.

Beneficial owners

Person	Rights

Bank accounts

Registered as a VAT taxpayer on 2017-12-06.

Nest Bank
32 1870 1045 2078 1092 6731 0001
mBank
86 1140 2004 0000 3602 8001 1622

Debt

No entries in the National Debtors Register (KRZ).

Public aid

Grant date	Purpose	Gross amount	Granting body
Jun 18, 2020	Aid compensating for the negative economic consequences of COVID-19, granted in limited amounts	––	Prezydent Miasta Stołecznego Warszawy

Competitors

Name	Revenue	Website
Gdagencysp. z o.o.	$34,948.70	gdagency.pl
Aquataxsp. z o.o.	$36,802.21	aquatax.pl
Biuro Doradztwa Podatkowego Polnag Commandosp. z o.o.	$36,635.89	polnagcommando.pl
Twój Bilanssp. z o.o.	$36,161.41	twojbilans.com
Dppa Auditsp. z o.o.	$36,131.34	dppaaudit.eu
Taxalia Groupsp. z o.o.	$37,831.54	taxaliagroup.com
Dywidendasp. z o.o.	$33,966.22	dywidenda.waw.pl
Easy Ledgersp. z o.o.	$32,085.49	easyledgerpl.com
Kancelaria Pit - Accounting and Legal Servicessp. z o.o.	$28,402.87	kancelariapit.com
Kancelaria Podatkowa Piotr Drabiksp. z o.o.	$30,916.00	kancelariapd.pl