COSK - Accountants en Adviseurs
Accountant · Rotterdam
5.014 reviews · GoogleCOSK - Accountants en Adviseurs in Rotterdam is listed under Accountant. The listing shows 25 services. Prices start at €150. On Google it has 5.0 out of 5 from 14 reviews.
About COSK - Accountants en Adviseurs
COSK is an accounting firm in Rotterdam. It provides bookkeeping, administration, tax returns, annual accounts, accountant’s reports and advice to business owners and private individuals.
Administration and tax returns
COSK handles financial administration, bookkeeping and payroll administration for business owners, private limited companies and small teams.
- Bookkeeping
- VAT return
- Payroll administration
- Personal income tax return
- Corporate income tax return
- Digital submission through a portal
Reports and annual accounts
Annual accounts services, RA reports and reports are also available.
- Preparing annual accounts
- Compilation report
- Review report
- Grant report
- Report of factual findings
- Accountant’s report for the IND (Dutch Immigration and Naturalisation Service)
Wealth advice
COSK assesses whether private investing or investing through a private limited company is suitable, and can handle the administration and annual accounts of an investment company.
- Assessing private investing versus investing through a private limited company
- Box 2 and Box 3 considered together
- Incorporation and contribution of assets with your civil-law notary
- Holding structure and dividend policy
Working method
An introductory meeting lasts 15 to 30 minutes. Clients submit documents digitally and have online access to their administration.
- Personal point of contact
- Digital portal
- Real-time dashboard
Who we serve
COSK works for business owners, small teams, foundations, non-profit organizations and private individuals with substantial assets.
- Business owners
- Private limited companies and directors who are major shareholders (DGAs)
- Self-employed professionals and sole proprietorships
- Small teams of up to 10 employees
- Foundations and non-profit organizations
- Wealthy private individuals
About the accountant
COSK was founded by a Registeraccountant (Dutch chartered accountant) and is affiliated with the NBA (Royal Netherlands Institute of Chartered Accountants).
- Registeraccountant (RA) (Dutch chartered accountant)
- NBA (Royal Netherlands Institute of Chartered Accountants)
Services and prices
VAT return
- Bookkeeping & VAT return€150
Payroll administration
- Payroll administration€250
Income tax return
- Personal income tax return€150
- Personal and corporate income tax returns
Corporate income tax return
- Corporate income tax return€250
Annual accounts
- Preparing annual accounts€500
- Preparing annual accounts
- Filing with the KVK
Audit and assurance
- Compilation report€500
- Review report€500
- Grant report€500
- Report of factual findings€500
- Accountant’s report
Income statement
- Accountant’s report for the IND€500
Tax advice
- Wealth advice
- Investment company and wealth structure
- Assessment: private investing versus investing through a private limited company
- Box 2 and Box 3 considered together
- Holding structure and dividend policy
Business advisory
- Strategic advice€500
Incorporate a private limited company
- Incorporation and contribution of assets with your civil-law notary
Financial administration
- Annual administration, corporate income tax and annual accounts
- Digital submission through a portal
Bookkeeping
- Bookkeeping & administration€150
Financial reporting
- Real-time dashboard
Prices are indicative. Check with the business before you go.
At a glance
| Listed under | Accountant |
|---|---|
| Location | Westersingel 94, 3015 LC Rotterdam |
| Number of services | 25 |
| Prices | €150 – €500 |
| Google rating | 5.0 out of 5 (14 reviews) |
| Weekend | Saturday, Sunday |
| Languages | Nederlands, Engels |
| Phone | 06 12803900 |
| Website | cosk.nl |
| Last updated | October 2026 |
Ratings
- 5.0Google14 reviews
Ratings belong to the platforms named. Read the reviews there.
Frequently asked questions
What does COSK - Accountants en Adviseurs offer?
COSK - Accountants en Adviseurs lists 25 services, including Bookkeeping & VAT return, Payroll administration, Personal income tax return, Corporate income tax return and Preparing annual accounts.
Where is COSK - Accountants en Adviseurs?
At Westersingel 94, 3015 LC Rotterdam.
When is COSK - Accountants en Adviseurs open?
Monday 09:00–17:00, Tuesday 09:00–17:00, Wednesday 09:00–17:00, Thursday 09:00–17:00, Friday 09:00–17:00, Saturday 09:00–17:00, Sunday 09:00–17:00. Check with the business before you go.
How do I book with COSK - Accountants en Adviseurs?
Call 06 12803900. Or contact the business through its website.
How is COSK - Accountants en Adviseurs rated?
On Google, COSK - Accountants en Adviseurs has 5.0 out of 5 from 14 reviews.
This listing is based on public information, such as the business's own website. It can contain mistakes.
Contact
Westersingel 94, 3015 LC Rotterdam
COSK - Accountants en Adviseurs does not manage this listing yet. Contact the business directly.
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Opening hours
| Monday | 09:00–17:00 |
|---|---|
| Tuesday | 09:00–17:00 |
| Wednesday | 09:00–17:00 |
| Thursday | 09:00–17:00 |
| Friday | 09:00–17:00 |
| Saturday | 09:00–17:00 |
| Sunday | 09:00–17:00 |
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