VaultaMost first budgets fail because they start with a wish list. "I will spend 200 on food" sounds good until you check that you spent 410 last month. A budget built on what you hope to do is a hope. A budget built on what you actually did, nudged a little, is a plan.
Set aside two hours. Make tea. You will need your bank and card statements for the last three months, and somewhere to write: a notebook, a spreadsheet or an app.
Step 1: Find your real income
Write down what lands in your account each month after tax. If your pay is steady, use that. If it varies, use the lowest of the last six months, and treat anything above it as a bonus. Include only money that reliably arrives.
Example: take-home pay of 2,900.
Step 2: List the fixed costs
These are the bills that are the same, or close to it, every month: rent or mortgage, insurance, phone, internet, loan minimums, transport passes, childcare. Add them up.
Example: rent 1,050, utilities 160, phone and internet 70, insurance 90, loan minimum 120, transport pass 65. Total fixed costs: 1,555.
Step 3: Add the yearly and occasional bills
This is the step people skip, and it is why budgets break in March or December. List the bills that arrive once or twice a year: insurance renewals, car tax, annual memberships, gifts, holidays, dental visits. Add them up and divide by twelve. This is the monthly amount you should set aside, even though the bills do not arrive monthly. The Journal piece on sinking funds goes into this.
Example: 1,440 of yearly costs gives 120 a month.
Step 4: Measure the flexible spending
Open your last three months of statements and total the spending in a few big categories: groceries, eating out, transport, shopping, fun. Divide each by three to get a monthly average. Do not judge it. Just measure.
Example: groceries 380, eating out 210, fuel and rides 140, shopping 150, fun 90. Total flexible: 970.
Step 5: Compare
Add up fixed, yearly and flexible costs: 1,555 + 120 + 970 = 2,645. Take that from income of 2,900 and the difference is 255. That is the money left over, the money that either drifts away unnoticed or goes to savings on purpose.
If the difference is negative, you are spending more than you earn, and the budget's first job is to close that gap. If it is positive, decide where it goes before the month begins.
Step 6: Decide what the leftover is for
Pick one or two targets. A common order is: a small starter emergency fund, then high-interest debt, then a bigger emergency fund, then longer-term goals. The emergency fund calculator can tell you how big the first target should be.
In our example, 255 left over could become 150 to a starter fund and 105 of extra debt payment.
Step 7: Set limits you can live with
Now set a monthly limit for each flexible category. Start from the average you measured and trim only where you genuinely wish to. A 10 percent cut is reasonable. A 50 percent cut usually lasts a fortnight.
Example: groceries 360, eating out 190, fuel and rides 135, shopping 120, fun 90 gives 895, which is 75 less than before. That lifts the leftover to 330.
Step 8: Build in a buffer
Add a small line called "slack" or "miscellaneous", maybe 3 to 5 percent of income. Life will hand you something unplanned every month. A buffer stops one surprise from ruining the whole plan.
Step 9: Choose how to track
Pick the lightest method that you will actually use. For some people it is a weekly look at their bank app. For others it is an app that shows what is left in each category. If you want one number for the day rather than a month-end report, that is the idea behind safe to spend, covered in a better question than what is my budget.
Step 10: Review after one month
At the end of month one, compare plan and reality. Do not feel bad about the gaps; they are information. Move amounts between categories. After three months you will have a budget that fits your life, not one copied from someone else.
Quick checks
- Does the plan add up to your income, with savings counted as a line?
- Are yearly bills included?
- Is there a buffer?
- Could you follow this for three months without feeling miserable?
If the answer to the last question is no, loosen it. A budget you keep at 80 percent beats a perfect one you abandon.
Tools that help
The 50/30/20 calculator offers a quick sanity check on proportions. A budget app can show what is left per category as the month goes on. In Vaulta that is the Budgets screen, along with a safe-to-spend figure, and the app is coming to the App Store. Read about the budget app for iPhone if you want to see how it is built.
Questions people ask
What if my income changes every month? Use the lowest of the last six months as your planning figure and treat anything above it as a bonus with a job: first the buffer, then goals. The article on saving with irregular income goes further.
How many categories should I have? Fewer than you think. Five to eight is plenty. Every extra category is another decision each time you log a purchase, and detail you will not use is just friction.
What if I overspend in one category? Move money from another category on purpose, and note which one it came from. That is what a budget is for. A budget that never moves is a budget nobody is using.
How often should I look? Weekly for ten minutes in the first two months, then fortnightly. A quick look at what is left in the big categories is enough.
In short
- Start from what you actually spent, not what you hope to spend.
- Include yearly bills by dividing them by twelve.
- Give the leftover a job before the month starts.
- Review after one month and adjust without guilt.
General information only. This article is general education built on simple arithmetic and example numbers. It is not financial, tax or legal advice. Your situation, local rules and tax treatment will differ, so check anything important with a qualified professional.