Note 33 Accrued expenses and deferred income

Group Parent company
MSEK 2021 2020 2021 2020
Koncernen Moderbolaget
Mkr 2021 2020 2021 2020
Payroll expenses Lönekostnader 1,912 1,831 58 45
Social security expenses Sociala avgifter 547 545 37 32
Operating expenses Rörelsekostnader 1,730 1,896 4 7
Negative value joint ventures 1) Negativa värde joint ventures 1) 17 16
Interest expenses Räntekostnader 7 6
Rent revenue Hyresintäkter 45 51
Total Summa 4,258 4,345 99 84

1)  Refers to joint ventures where the net value of equity and internal profit elimination is negative.