By The Income Tracker · Updated 8 September 2026 · 5 min read
The short answer
Zero-based budgeting means every pound of take-home pay is assigned a job before the month starts: bills, food, transport, fun, savings, until income minus assignments equals zero. The simple UK version uses last month's real transactions as the starting point, so you are adjusting numbers rather than inventing them.
The idea in one line
Income minus every planned use of it equals zero. Not zero in the bank; zero unassigned. Savings and debt payments are jobs like any other, which is why the method works: the money for them is allocated before it can be spent.
Set it up from a bank CSV, not from scratch
Export last month from your bank and import it into The Income Tracker. Now you have real category totals rather than guesses.
Copy the recurring rows forward. Rent, council tax, energy, broadband and the rest seed the new month automatically.
Set an amount for each variable category, starting from last month's actual and nudging it up or down.
Assign what is left. Savings, emergency fund, an extra debt payment, a sinking fund for the car or Christmas. Keep going until the surplus reads zero.
During the month, spend from the categories. When one runs dry, move money from another rather than overspending; that is the whole discipline.
Where it goes wrong, and the fix
Problem
Fix
Forty categories and constant tinkering
Ten categories. Coarse is fine.
Irregular bills wreck the month (car tax, insurance, Christmas)
Sinking funds: assign a twelfth of each annual cost every month.
Variable income
Budget on the lowest recent month and treat the rest as bonus. See the variable income guide.
It becomes a second job
Do it once a month, after payday, in ten minutes. Let the import do the recording.
Do you need YNAB for this?
YNAB is the best-known zero-based tool and it is genuinely good at it, with a price to match. You do not need it to use the method. A monthly ledger with categories, recurring items and a surplus figure does the job, and The Income Tracker does that for free without a bank login. If you want the full envelope workflow with goals per category, YNAB earns its fee.
The Income TrackerTrack it free. No account, no bank login.
A method where every pound of income is assigned to a category, including savings and debt payments, until nothing is left unassigned. Income minus planned uses equals zero.
Does zero-based budgeting mean spending everything?
No. It means allocating everything. Savings and debt payments count as allocations, so money is set aside on purpose rather than left over by accident.
What is a sinking fund?
A monthly set-aside for a cost that arrives once or twice a year, such as car insurance, so the bill is already covered when it lands.
Is there a free zero-based budgeting app in the UK?
The Income Tracker gives you categories, recurring items and a surplus figure for free with no bank login, which is enough to run the method. YNAB is the paid, fuller version.