The privately-owned company recorded an operating profit of £23.6m, up from £2.9m the previous year after paying an outstanding loan of £22m six years ahead of schedule.
Wilko finished the year with £96m in cash and equivalents.
The company put the positive period down to lower costs and strong sales over the Christmas trading period.
The Wilko strategic report filed at Companies House yesterday said its customer satisfaction score increased seven per cent year-on- year.
Wilko opened eight new stores over the year, bringing its total to 370. Capital investment over the year totalled £24m as it continues IT investment in its supply chain.