In the centrosymmetric tetra-nuclear title compound, [Sn(4)(C(4)H(9))(8)(C(7)H(5)O(3))(4)O(2)], one of the two independent Sn atoms is five-coordinate in a cis-C(2)SnO(3) trigonal-bipyramidal geometry [C-Sn-C = 142.7 (1)°]; the geometry is distorted owing to a long Sn⋯O(double bond) inter-action [Sn⋯O = 2.862 (1) Å]. The other Sn atom has a bent R(2)Sn skeleton [C-Sn-C = 144.0 (1)°], but the geometry is best regarded as being a trans-C(2)SnO(4) octa-hedron as the Sn-O(single bond) inter-action is shorter [Sn-O = 2.674 (1) Å].