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TapSum Journal

Money habits, explained by research

TapSum Journal explains everyday money habits through published research: why budgets fail, how small purchases add up, what actually helps people save. Each article answers one question, links to the original studies, and ends with practical steps.

15.5%how far monthly spending predictions fell below actual spending

Why You Underestimate Your Monthly Spending (and How to Fix It)

Most people underestimate their monthly spending by 15-30%. Research explains why and gives five evidence-based ways to budget more accurately.

· 6 min