Why Traditional Budgets Break Down
You set a budget in January. By March, everything's changed. Your car needs repairs. You get a bonus. Your rent increases. The budget becomes irrelevant.
Rolling budgets solve this by constantly updating. Instead of annual planning, you work with 12-month windows that move forward each month. When April arrives, you drop last April and add next April.
This isn't just theory. Companies like Unilever and Beyond Meat use rolling forecasts because markets change too fast for annual plans. The same principle works for personal finances.