What is a budget? Wikipedia gives the following answer: "A budget is a financial plan for a defined period of time." So, it is a financial plan . Basically this is a list of incomes, expenses etc. However, most of the personal finance apps track "budget" as a set of limits. Like: - how much may I spend on food - how much may I pay for fuel and so on. Such limits are usually set per month. Setting limits is good approach, it can help control the spendings when user sees he is close to limit, but the month is in its middle. However, this is not sufficient for The Finance Planner. We think of budget as a list of planned transactions. In fact, this is a small difference: if you plan to spend $300/month on fuel, you just schedule monthly transactions. And when you buy fuel, you cut (split) the planned transactions. For instance, if you spent $20 on fuel today, you cut the planned transaction and get two: - $20 - committed (paid) - $280 - still planned.