NS went into the red for 2.6 billion euros last year.
The carrier announced this on Thursday.
The reason for this is that the company transported considerably fewer passengers due to the corona crisis and decided to lower a number of transport contracts, including in the Netherlands, by 2.3 billion euros.
NS is also asking for more financial support from the cabinet on Thursday.
This extra support is needed to maintain the current timetable this year, as well as to run a new timetable next year.
Given the lower passenger numbers, new financial agreements are needed, the company says.
NS has already received 2.3 billion euros in corona support.
The large loss is therefore partly due to the fact that NS is making a number of significant write-downs.
This includes the contract for the Dutch Main Rail network, which, according to the carrier, has become worth 1.6 billion euros less, because it will be loss-making until 2025.
This is due to lower passenger numbers in the coming years.
"Due to the corona pandemic, fewer travelers are buying a ticket, travelers are pausing their subscription and sales in the shops at the stations are decreasing," the company said in an explanation of the figures.
"We do not expect to be back to the 2019 passenger level until 2025 at the earliest."
In addition to write-downs and a request for additional support, NS has now also initiated a savings program of 1.4 billion euros.
Among other things, 2,300 jobs must be lost.
Recently, it was agreed with trade unions that there will be no compulsory redundancies until 2025. The jobs must disappear due to natural attrition.
Investments are also being scaled back.
The figures also show that there was still little going on in January and February of last year.
Passenger numbers were about the same level as in the first two months of 2019. After that, the numbers plummeted, with April as the lowest point, when approximately 90 percent fewer passengers were transported.
After that, the figures rose steadily through September, before falling again in the autumn.