This report investigates the tendency of couples in the United Kingdom to invest in tax-deferred retirement plans. It begins with an introduction to tax-deferred savings schemes and their importance for old-age financial security, justifying the study by highlighting the need to identify which employee groups benefit most from these plans. The research employs hypothesis tests, visual representations, and regression analysis on a sample of 194 couples, examining factors such as the number of dependent children, salary levels, and debt amounts. Key findings indicate a weak positive correlation between the number of children and investment, a similar correlation between salary and investment, and an inverse relationship between debt and investment. The report concludes with recommendations based on these findings, emphasizing the need to encourage broader participation in tax-deferred retirement plans.