Kalender Balap Sirkuit TT Assen 2021
| Tanggal | Racing Series diterjemahkan menjadi Seri Balap | Putaran | Nama Acara |
|---|---|---|---|
| 18 April - 18 April | Kelas Porsche RS Selesai | Round 1 | |
| 18 April - 18 April | Piala Porsche GT Selesai | Round 1 | |
| 18 April - 18 April | Piala Porsche Boxster Selesai | Round 1 | |
| 18 April - 18 April | Piala Porsche 944 Selesai | Round 1 | |
| 6 Juni - 6 Juni | Kelas Porsche RS Selesai | Round 5 | |
| 6 Juni - 6 Juni | Piala Porsche GT Selesai | Round 5 | |
| 6 Juni - 6 Juni | Piala Porsche Boxster Selesai | Round 5 | |
| 6 Juni - 6 Juni | Piala Porsche 944 Selesai | Round 5 | |
| 25 Agustus - 25 Agustus | Piala Balap BMW Selesai | Round 3 | |
| 27 Agustus - 28 Agustus | Tantangan Bersejarah Klub Porsche Selesai | Round 5 | RSG Racing Days |
| 12 September - 12 September | Kelas Porsche RS Selesai | Round 7 | |
| 12 September - 12 September | Piala Porsche GT Selesai | Round 7 | |
| 12 September - 12 September | Piala Porsche Boxster Selesai | Round 7 | |
| 12 September - 12 September | Piala Porsche 944 Selesai | Round 7 | |
| 17 September - 19 September | Piala Porsche Carrera Benelux Selesai | Round 5 | |
| 17 September - 19 September | Master Mobil Turing Jerman Selesai | Round 6 | |
| 5 Oktober - 5 Oktober | Piala Balap BMW Selesai | Round 5 |