Budget Planner

How to use Budget Planner

1. Enter your monthly after-tax income.
2. List your fixed needs, then your discretionary spending.
3. Compare the split against 50/30/20 and adjust the proportions to what you can sustain.
4. Set up an automatic transfer on payday for the savings figure.
5. Use after-tax income — budgeting from gross pay overstates what you have by a large margin.
6. Annual costs (insurance, road tax, subscriptions) should be divided by twelve and treated as monthly.
7. Nothing is stored; figures stay in your browser.

The 50/30/20 rule, and when it does not fit

Half of after-tax income to needs, 30% to wants, 20% to savings and debt repayment. It is a useful default because it is simple enough to follow, and it fails in expensive cities where housing alone exceeds 50%. When that is the case the rule is not telling you that you are doing it wrong; it is telling you that housing costs are structurally high and the other categories must absorb it. Adjust the proportions to something you can actually sustain — a budget nobody follows is worse than a rough one they do.

The line between needs and wants is where budgets fail

Rent, utilities, groceries, insurance, minimum debt payments and transport to work are needs. Streaming subscriptions, restaurants, the upgraded phone and most of what arrives by delivery are wants. The distinction is uncomfortable precisely because the wants are the enjoyable part, and the common failure is reclassifying a want as a need to make the numbers work. If it could be cancelled next month without changing your ability to live and earn, it is a want.

Pay yourself first, automatically

Budgets built on saving whatever remains at the end of the month reliably save nothing, because spending expands to fill the available money. Reversing it — moving savings out on payday, before anything else — works because the remaining balance becomes the budget. A standing order on the day you are paid takes five minutes to set up and removes the monthly decision entirely, which is the point: it stops depending on willpower.

The order to put money in

A small emergency buffer first, perhaps one month of expenses, so an unexpected bill does not become debt. Then any employer pension match, which is an immediate guaranteed return and the closest thing to free money most people encounter. Then high-interest debt, because paying off 20% interest beats any investment return reliably available. Then build the emergency fund to three to six months. Then longer-term investing. The order matters more than the amounts.