Note 34 Accrued expenses and deferred income

Group Parent company
MSEK 2020 2019 2020 2019
Koncernen Moderbolaget
Mkr 2020 2019 2020 2019
Payroll expenses Lönekostnader 1,831 1,493 45 34
Social security expenses Sociala avgifter 545 640 32 25
Operating expenses Rörelsekostnader 1,896 1,790 7 16
Negative value joint ventures 1) Negativa värde joint ventures 1) 16 13
Interest expenses Räntekostnader 6 10
Rent revenue Hyresintäkter 51 61
Total Summa 4,345 4,007 84 75
1)  Refers to joint ventures where the net value of equity and internal profit elimination is negative.