The NET Budget

Says who?

The classic budgeting mistake announces itself in one line: "$400 a month on groceries." Says who? A template? An article written for a different family in a different city? Aspiration, dressed as arithmetic? Meanwhile, the most relevant dataset on your grocery spending that has ever existed — your own last twelve months — sits unread in your transaction history, knowing exactly what you actually spend.

The NET Budget — the income-versus-expenses picture, managed by category — starts there, from actuals, and this chapter is about the two moves that make it honest: anchoring targets to history, and respecting the shape of your year.

Anchor to actuals, adjust deliberately

Pull each category's trailing twelve months. That's your baseline — including the months you'd rather not count, because they count: the December that always happens, the car-repair month, the vacation. A baseline with the embarrassing months excluded isn't a baseline; it's a brochure.

From the baseline, set targets as deliberate changes, not fresh inventions: dining at actual-minus-15%, not at a fantasy number imported from someone else's life. The difference is structural. A target derived from history is a forecast you're trying to bend, slightly, on purpose — it starts credible and asks for one specific behavioral delta. A target invented from wishes is fiction, and the month it collides with reality, the collision discredits the entire budget — which is how budgets end up abandoned by March. The target isn't a moral judgment; it's an intervention on a trend, and interventions work best when they're modest, specific, and honest about the starting point.

Level vs. Shape: respecting the year

Then comes the subtlety most budgets miss entirely: spending has a shape. Utilities peak seasonally. Gifts spike in December. Insurance lands twice a year. A category can be perfectly on-plan annually while being wildly "over" in the months that were always going to be big — and a budget that doesn't know that will cry wolf all winter.

Two target styles handle it. Level — a flat monthly number — is right for genuinely steady categories: groceries, subscriptions, fuel. Shape — a target that follows your historical monthly pattern — is right for the lumpy ones: it expects December to be December, funds August's back-to-school month as history says August behaves, and stops marking you "over budget" for the utility bill that arrives every January of your life. The distinction sounds cosmetic; it's actually load-bearing for trust. Every false "over budget" alarm erodes belief in the numbers (the same sawtooth problem as Reading Your Own Transactions's seasonality), and a budget nobody believes is a budget nobody follows. Shape targets keep the alarms honest, which keeps the budget alive.

The worked numbers

Dining history: $7,200 over twelve months — $600 a month, actual, including the birthday dinners. A meaningful-but-livable target: $510 a month (−15%) — worth about $1,080 a year, extracted from one category without fantasy. In income context: at $7,500 take-home that's a comfortable trim; at $4,000 it might be the single biggest Extra FLOW source available, which is exactly why it should be set at minus-15-real rather than minus-40-imaginary — the modest target that survives generates more than the heroic one that collapses.

A gift category with $1,800 of annual history didn't spend $150 every month — it spent $900 across November and December. A Level target of $150 calls November a disaster and May a triumph, both falsely. A Shape target expects exactly what history shows, and stays honest in both February and December.

Where Plenee fits

Plenee's NET Budget table shows each category's last-twelve-months actual beside your target, with the change expressed in both percent and dollars — so every target is visibly a deliberate delta from reality, not an invention. And each target can be split Level or Shape across the months, following your real pattern, so the lumpy categories get lumpy targets and the alarms only ring when something actually changed. The FLOW Budget (Building Your FLOW Budget) handles whether the cash will be there; the NET Budget handles whether the period came out ahead — two instruments, deliberately distinct (that's the FLOW/NET distinction doing real work).