A financial plan for the year: what belongs in it and what doesn't

An annual plan is usually imagined as a spreadsheet with twelve columns of monthly spending. It gets built in January, diverges from reality by March, and is forgotten by June.

The approach itself is the problem. Predicting a specific August’s spending seven months ahead isn’t possible, and attempting it turns the plan into a guessing exercise.

An annual plan answers different questions, and monthly detail isn’t one of them.

Four blocks

The base arithmetic. Annual income, annual fixed costs, annual irregular costs, planned saving. Four numbers whose relationship shows whether you have margin and how much.

It’s easier to calculate from a month: take a typical one, multiply by twelve, and add irregular costs as a separate total. The mechanics match a monthly budget; only the horizon differs.

A calendar of large events. Not spending by month, but specific known events with dates: insurance in March, a holiday in July, servicing in September, gifts in December.

This block is the most useful and the most overlooked. It converts “unexpected” costs into scheduled ones and shows which months will be heavy before you reach them.

Goals with amounts and dates. Not “I want to save,” but specific figures with deadlines, arranged in a queue. The ordering criteria are in several goals at once.

Review points. Three or four dates in the year when you sit down and compare the plan against reality. Without them the plan doesn’t survive.

What doesn’t belong

Monthly spending forecast to the dollar. You don’t know what October’s groceries will cost, and no spreadsheet changes that.

Optimistic income. A plan that only reconciles with a raise and a bonus doesn’t reconcile.

Items like “spend less on eating out.” That’s an intention rather than a plan: no number, no way to check it.

Year-long tasks with no interim markers. An annual horizon without milestones doesn’t hold, and that applies to goals and habits equally.

Building the calendar

The most practical part, and it takes twenty minutes.

Write down every known event in the next twelve months with approximate amounts. Insurance, servicing, birthdays that need gifts, trips, subscription and licence renewals, seasonal purchases, courses.

Lay them out by month. What emerges is a picture where March costs $800 above normal and August costs $2,000.

Two conclusions follow. First: the annual total of irregular costs, which divided by twelve gives the monthly contribution to a fund, covered in sinking funds.

Second: which months will be difficult. Knowing that in January lets you prepare in advance rather than discovering in August that the holiday coincides with the car service.

Three review points

A plan written once describes somebody else’s life by spring. It needs reviewing, though not constantly.

End of March. One quarter in, you can see whether the base arithmetic holds. If actual spending runs noticeably above plan, the issue isn’t discipline — the plan was built on understated figures.

End of June. Halfway. This is where goals get checked: are they moving at the stated pace? A goal a quarter of the way through after six months needs its date recalculated rather than hopes of catching up.

End of September. The last point where anything can change before year end. This is usually where you decide which goals close this year and which move.

A fourth point in December isn’t a review at all — it’s writing next year’s plan.

When the plan drifts

It will, and that’s normal. The question is what counts as a signal.

Deviation within ten percent of planned spending means nothing. That’s ordinary variation and needs no response.

Twenty percent or more means the plan was wrong or circumstances changed. The correct response is recalculating the plan rather than forcing reality back into it.

Systematic deviation in one direction across two quarters means the base figures are inaccurate. Rigidity doesn’t help here; measurement does. Rebuild the plan from the last six months of actuals.

An annual plan on irregular income

A separate case where monthly logic doesn’t apply at all.

Calculate from your baseline income — what you earned in weak months — rather than from an average. Averages are inflated by strong periods, and a plan built on one won’t hold, which is covered in budgeting on irregular income.

The second difference: goals get set as percentages of what arrives rather than as fixed amounts. The plan then doesn’t break in a weak quarter.

And third: you need more review points, four to six rather than three, because reality deviates more often.

The year doesn’t have to start in January

The habit of planning against the calendar year looks natural and rests on nothing.

If your income tracks an academic year, a season, or the date your salary gets reviewed, counting the year from that point makes more sense. An annual cycle matching your reality goes stale more slowly than one matching the calendar.

The same applies to review points. Attaching them to events rather than quarter ends works better: after the bonus lands, after insurance renews, after the summer holiday. Those dates you’ll remember, unlike an abstract 30 September.

And writing the plan needn’t wait for January either. A plan assembled in May works exactly as well as one assembled in January, and waiting six months for a tidy date costs you six months.

One evening at the start of the year

Assembling an annual plan takes about two hours, and most of that goes on the calendar of events.

Start with the calendar even if you postpone the other blocks. On its own it solves the central problem of annual planning: it shows that unusual months occur regularly and predictably, which means you can prepare for them.

Everything else can be added later. Without the calendar, the year is once again a series of surprises.