Tax and structuring
“I am beyond happy and would recommend their services to anyone. Their ability to handle complex and sophisticated matters is very strong. They are excellent.”
— Chambers
We provide a broad range of tax advisory services on both international and domestic tax matters with focus on transactions, tax controversy and corporate tax advice. Our team delivers strategic insights across all facets of taxation including corporate taxation, M&A structuring, incentive programs, financial services tax, value added tax and real estate taxation.
Our team with recognized and seasoned tax professionals has extensive experience of providing tax advice even in the most complex matters. We are committed to delivering practical and commercial solutions for our clients to best serve their business strategies. We believe in providing a one-team approach which is why our tax team closely cooperates with our other practice groups.
Our tax services complement our ability to execute high-end transactions, equity and debt structures, and litigations processes to achieve the best results for our clients.
Selected Cases
Rankings
Avance has yet again achieved Tier 2 ranking in both the Tax controversy and Transactional tax categories, reflecting our team’s dedication to providing top-tier tax advisory services. Moreover, Avance maintained its Tier 3 ranking in General corporate tax and Indirect tax categories. Partner Sebastian Kellas continues to be recognized as ‘Highly Regarded’ in the Real estate and Transactional tax, and Senior Advisor Antti Leppänen is once again acknowledged as ‘Highly Regarded’ in Tax controversy. In addition, Senior Associate Janina Järvi continues to be celebrated as a ‘Rising Star’ in Transactional tax and as a ‘Women in Tax Leader’. Senior Associate Anneli Nurminen receives her first recognitions as a ‘Rising Star’ in General corporate tax and a ‘Women in Tax Leader’.
ITR World Tax 2026
Avance has received the Impact Deal of the Year award at the International Tax Review (ITR) EMEA Tax Awards 2025 for advising KKR in its acquisition of a majority stake in Accountor Software, a leading provider of mission critical business software in Finland and Sweden.
ITR EMEA Tax Awards 2025
“The cutting-edge combination of high capabilities in tax law and understanding the client’s business. Based on this, Sebastian Kellas and his team provide solutions which not only solve the tax issue at hand but also fit the client’s business strategies. This is truly unique, and we highly appreciate this.”
“Team provided great professional work on legal and tax-related matters.”
“They are subject matter experts in their field and drill into the matters they are looking at.”
“Avance tax team has an excellent understanding of insurance sector-related tax matters.”
The Legal 500 2025, Tax
“The lawyers handle everything quickly and well.”
“They provide a holistic view of transactions and strong discursive guidance on decision proposals. They have good knowledge of tax precedents.”
“I am beyond happy and would recommend their services to anyone. Their ability to handle complex and sophisticated matters is very strong. They are excellent. They are the best advisors I have had.”
Chambers Europe 2025, Tax
Avance has achieved Tier 2 rankings in both the Tax controversy and Transactional tax categories, reflecting our team’s dedication to providing top-tier tax advisory services. Additionally, Avance received Tier 3 rankings in General corporate tax and Indirect tax, with the latter marking our debut in this category. Partner Sebastian Kellas continues to earn recognition as ‘Highly Regarded’ in the Real estate and Transactional tax. Antti Leppänen, is again named ‘Highly Regarded’ in Tax controversy, while Senior Associate Janina Järvi is celebrated as a ‘Rising Star’ in Transactional tax.
ITR World Tax 2025
Main contacts
