Meanwhile, Tang had earned a doctorate in Economic Sciences in 2000 for his dissertation on endogenous growth theory; one of his promoters was politician Rick van der Ploeg.

As a number of MPs from his party joined the Balkenende IV cabinet, Tang was still installed as an MP on March 1, 2007.

Tang also served as a Member is the consecutive Special Committee TAXE2 and TAX3, which focused on increasing transparency and cooperation between governments and between national parliaments in the field of taxation and on new tax evasion and avoidance issues.

In December 2015, Paul Tang became responsible for the new legislation on Simple Transparent and Standardized (STS) securitization on behalf of the European Parliament.

This formed the reason for Tang's report to place a heavier emphasis on supervision and require more transparency on loans being resold.

Banks and financial institutions were eager for the European Parliament to rush the new legislation and were therefore not happy with Tang's stance.

On Nov. 24, 2016, Paul Tang was appointed rapporteur on the directive for a European Common Corporate Tax Base (CCTB).

The common base is attached to a second bill that proposes to consolidate and allocate profits tax within the EU to member states, called CCCTB.

In December 2017, while dealing with the Panama Papers, Tang filed an amendment that added to a list of external tax havens five internal ones: Luxembourg, Malta, Cyprus, Ireland and the Netherlands.

This regulations put forward an transparency framework on sustainability-related disclosers in the financial sector, which allows investors to assess sustainability risks.

[11] In March 2019, the Economic and Financial Affairs Council blocked the proposal, pending negotiations at the OECD level.

Among other things, he emphasized independent audits and transition plans, which enable financing of sustainable activities over time.

[14][15][16][17] On behalf of the European Parliament, Tang was one of the rapporteurs on the DSA initiative report in 2020 and, as the initiator of the European Tracking-free Ads Coalition - a coalition of politicians, NGOs and companies formed to ban tracking ads on the Internet - filed several successful amendments against tracking and targeting.

In the final legal text, this led to a ban on profiling through processing of special personal data and minors.

The agreement on the DSA was dealt with in parallel with the consideration of the sister law DMA (Digital Markets Act), in which Tang was also involved as a negotiator.

His effort to remove mass scanning of all, encrypted and unencrypted communications from the law was adopted by a large majority of the European Parliament.[source?]

[19] At his urging, following the TAXE, TAXE2, TAX3 and PANA committees, the Subcommittee on Taxation (FISC) was established in September 2020 for which Tang was elected chairman .

During this symposium, delegates from the IMF and the OECD, Ministers and politicians from various European countries, Euro Commissioners and parliamentarians as well as academics and business representatives spoke.

Efforts include improving and broadening information on who has what assets where As a member of the ECON Committee, Tang is also involved in legislation on investment funds AIFMD with the goal of better protecting investor from opaque structures.

Since May 30 2024 he is executive cabinet member and first deputy mayor of the city Almere with the portfolio of Housing, Spatial Development and Sport.