How to make a monthly budget

Quick steps

1. Write down take-home income.
2. List fixed monthly bills.
3. Add occasional and annual costs.
4. Choose a sustainable savings goal.
5. Give flexible spending a limit.
6. Compare the plan with actual results at month-end.

1. Start with take-home income

Use the money that reaches your account after taxes and deductions. Keep rental and side income on separate lines. If earnings vary, use a cautious baseline instead of your best month. Income you have not received is different from cash available today.

2. List fixed monthly bills

Include rent, loan payments, phone, internet and monthly subscriptions. Record the payment date as well as the amount. Separate automatic payments from those requiring your action so you know which commitments to check as they approach.

3. Add occasional and annual costs

Insurance, taxes, annual memberships, gifts and holidays do not happen every month. Put each cost in the month it falls due. To prepare in advance, divide the amount across the remaining months and set money aside. Avoid treating the set-aside money and its eventual payment as two separate expenses.

4. Choose savings before flexible spending

First make sure essential needs and required payments are covered. Then choose a sustainable savings amount. The 50/30/20 approach uses 20% as a starting example, not a target suitable for everyone. Income and debt circumstances can require a different amount. Deliberately allocating remaining income is easier to review than relying on whatever happens to be left.

5. Give flexible spending a limit

Set realistic limits for groceries, transport, eating out and optional shopping. Start with a few categories you will actually review rather than dozens you cannot maintain. Past spending is a better starting point than an arbitrary number. Leave a buffer for small unexpected costs.

6. Compare the plan with actual results

Confirm actual income, bills and card statement totals. Compare planned and actual savings; note the reason for a large difference. Use recurring differences to improve next month’s estimates. One expensive month does not invalidate the budget: the purpose is to make the next decision with better information.

Example: a $4,000 monthly budget

Example figures, not recommended targets. $4,000 − $2,000 − $800 − $800 = $400. If expenses plus your savings goal exceed income, rebalance the plan. Money allocated to savings is not spending.

Handle credit cards without double counting

A card purchase and its statement payment are two views of the same spending. Either track the purchases as expenses or record the statement as the total cash outflow. With the statement approach, individual card purchases can remain category detail without creating another cash expense. Record cash and debit card spending separately.

Common mistakes

• Using gross pay and forgetting deductions.
• Ignoring annual bills until they fall due.
• Counting card purchases and the statement as separate expenses.
• Creating more categories than you can maintain.
• Treating a budget surplus as your bank balance.

Frequently asked questions