20. Trade and other liabilities
(in millions of euros) | 31 December 2021 | 31 December 2020 |
Trade payables | 446 | 389 |
Current portion of deferred credits | 35 | 38 |
Other taxes and social security charges | 107 | 499 |
Other liabilities | 771 | 572 |
Accrued expenses and deferred income | 288 | 524 |
Total | 1,647 | 2,022 |
Trade and other payables includes an amount of €36 million (2020: €88 million) related to ProRail and the Dutch central government, of which €8 million relates to the NOW scheme (31 December 2020: €86 million). As at year-end 2021, NS had received €313 million (year-end 2020: €0 million) in collateral in the form of margin money from Eneco, which is recognised under other liabilities.
The Group's liquidity risk due to trade and other payables is stated in note 25 and the continuity section.
Other taxes and social security charges have decreased because the year-end balance includes the deferral of payroll taxes in the Netherlands. The Group fulfilled this obligation in 2021.