Your budget says one thing. Your actual results say another. Why?
Having a budget is useful. But the budget itself is not where the value is. The important part is what happens after it is prepared.
Comparing the two
Each month, you can compare what you planned against what actually happened:
| Line | Budget | Actual | Variance |
|---|---|---|---|
| Sales | £50,000 | £47,500 | −£2,500 |
| Staff costs | £15,000 | £17,500 | −£2,500 |
| Marketing | £3,000 | £4,200 | −£1,200 |
| Operating costs | £8,000 | £7,600 | +£400 |
These differences are called variances.
The point is not to make every number match
This is worth saying plainly, because it is the most common misunderstanding.
A budget is a plan made with the information available at the time. Reality will differ. Chasing the budget line by line turns a management tool into an exercise in looking obedient.
The point is to understand why the differences arose, and whether they tell you something you need to act on.
The questions behind the numbers
Looking at the table above:
- Sales came in £2,500 below plan. Is that timing — an order slipping into next month — or genuinely lost work?
- Staff costs are £2,500 over. Was the extra cost planned, or did it come as a surprise? Overtime to deliver a specific job is a different matter from a permanent increase in the cost base.
- Marketing is £1,200 over. Was that a deliberate decision, and did it produce anything?
- Operating costs came in £400 under. Genuine saving, or a cost that has simply not landed yet?
Notice that the variances run in both directions. A budget comparison is not a report on overspending; it is a report on how closely reality is following the plan.
What regular variance analysis gives you
- Early warning when something is drifting, while you can still respond
- A check on whether price rises are being passed on, or quietly absorbed into your margin
- Evidence for decisions — whether that hire paid for itself, whether that campaign worked
- A better budget next year, because you learn where your assumptions were wrong
Timing versus permanence
The single most useful question about any variance is whether it is a timing difference or a permanent one.
An invoice landing a month late creates a variance in two consecutive months and nets to nothing. A supplier increasing prices by 8% creates a variance that will repeat every month until something is done. They look identical in the first month and could not be more different.
Keeping it proportionate
You do not need to explain every variance. Set a threshold — a percentage, a pound value, or both — and investigate what crosses it. Otherwise the exercise becomes a monthly chore and gets quietly abandoned.
A budget is your plan. Variance analysis tells you how closely reality is following that plan, and gives you the chance to do something while it still matters.
This works best as part of regular management accounts, where the comparison is produced each month alongside the figures rather than attempted once a year.
If you would like help setting up a budget and a monthly comparison that is actually useful, book a consultation.
