Working method for investing in real estates (1), as a result, characterised that the real estates (1) are sold by a salesman (2) to several purchasers (3a-3d), where the purchasers (3a-3d) invest each a sum (4) in the real estates (1) so that them jointly, in onverdeeldheidonverdeeldheid and each for certain percentage in proportion with their respective invested sum (4) owner of real estates (1) become, where purchasers (3a-3d) number of of year obliges in onverdeeldheidonverdeeldheid remain and where during these years for each purchaser (3a-3d) a turnover (7) are guaranteed by the salesman (2) that is obtained rental incomes (6) from the rent of the real estates (1).