Corosar – an accounting firm in Helsinki
We take care of your accounting so you can focus on your work. Accounting Firm Corosar is based in Helsinki and serves clients across Finland.
Or call +358 50 590 7166
Corosar is an accounting firm for sole traders in the Helsinki metropolitan area
Clear accounting at a fixed price
We’re always easy to reach when you need help.
Our mission and value promise
At Corosar, everything revolves around one thing: your success. Our mission is to make your everyday business life easier, so you can focus on what truly matters — doing your work without unnecessary administrative stress.
We’re here for you
You’ll have your own accountant who knows your business and speaks in plain language. We’re easy to reach and ready to help whenever you need us.
No unnecessary waiting
We take care of agreed tasks on time, without delays. Important filings and documents are ready when they need to be — no chasing, no surprises.
We respond quickly and keep things moving.
We handle your accounting and admin so you don’t have to think about them. Things move forward clearly and without unnecessary hassle — exactly as they should.
Key figures
200
Trusted by over 200 sole proprietors
The industry may change, but the need for clear and reliable service stays the same. That’s why over 200 entrepreneurs from different fields trust us.
2021
Domestic family business since 2021
Clear and approachable service for sole proprietors — without unnecessary bureaucracy.
20 M€
Accounting services supporting over €20M in annual revenue
Over €20M in annual revenue flows through our accounting services
Meet our team
Ilja Mikkonen
Bachelor of Business Administration, Accounting
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Liisa Mikkonen
Bachelor of Business Administration (BBA)
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Our story
Corosar was founded in 2021 with a simple idea: to create an accounting firm that does things a little differently — a bit better, a bit smarter, and above all, more genuinely and proactively. Our goal was to build a service where entrepreneurs don’t feel alone with paperwork, receipts, and tax matters.
At Corosar, it’s not just about bookkeeping — it’s about partnership. We want to be the trusted person you can always call when something is on your mind, someone who takes care of things on your behalf so you can focus спокойно on what you do best: growing your business.
