People struggle to accurately forecast monthly cash flow when managing annual lump-sum expenses

Individuals and households with annual insurance payments (and similar large periodic expenses) lack a clear mental model for incorporating these into monthly budgets, causing cash flow surprises and poor financial planning. Existing budgeting tools treat monthly and annual expenses as separate categories, forcing users to manually calculate amortized costs or risk underestimating their true monthly obligations. This creates anxiety around unexpected large payments and makes it impossible to know their real monthly discretionary income.