What's Really Driving Your Numbers This Year?
Most founders can tell you what happened in their numbers this year. Revenue's up, or it's flat, or it took a dip in Q3. Costs crept higher than planned. Cash felt tighter than the P&L suggested it should.
Far fewer can tell you why.
And that gap between knowing what the numbers say and understanding what's actually driving them is where budgets built for next year quietly fall apart before they've even started. You need to understand your starting point and the key drivers before you think about next years budget.
From "the what" to "the why"
In last month’s blog on management accounts, we made the point that numbers without context are just numbers. That good management accounts aren't a compliance exercise, they're for you, designed to help you actually run the business, and the commentary should explains why something is different to the plan not just tell you there was a variance.. If you haven't read it yet, it's worth a quick look before this one.
So the Why is the right starting point. But there's a natural next question that comes after it: once you know why something moved this year, what do you actually do with that, going into next year?
Two kinds of variance, and only one of them matters for 2027
When something doesn't land where you expected it to, there are really only two explanations: it was a one-off, or it's structural.
A one-off might be a delayed contract, a piece of unplanned capital spend, a client who paid three months late. It happened, it affected the year, and, assuming nothing else changes, it won't happen again.
A structural driver is different. It's a cost that's gone up and isn't coming back down. A sales cycle that's genuinely got longer. A margin that's been quietly eroding deal by deal. These don't resolve themselves… they will carry forward into next year (unless you do something) whether you plan for them or not.
The problem is that from inside the day-to-day, the two can look identical. Both show up as “we didn't hit the number.” Both feel, in the moment, like something that just needs to be pushed through. It's only when you sit down and properly separate the noise from the signal that the real shape of the business …. and the real starting point for next year becomes visible.
From "why" to "what now"
Understanding why a number moved is only useful if it changes what you do next. A one-off variance usually just needs noting and setting aside. It's context for the year, not a lever to pull. A structural one is different: it needs a decision. Do you absorb the cost increase into pricing? Renegotiate the thing that's driving it? Build it into how you plan resourcing going forward? None of those decisions can be made well while the driver itself is still misclassified as “just one of those years.”
This is usually where founders get stuck, not because they lack the numbers, or even the monthly commentary explaining them, but because nobody's sat down and forced the sort: this bit was noise, this bit is signal, and here's what the signal is telling us to do differently.
Why this has to come before the budget, not during it
It's tempting to skip straight to building next year's numbers. But a 2027 budget built on top of an unexamined 2026 inherits every one of its blind spots. If a cost increase gets waved through as “a one-off” when it's actually structural, next year's budget starts under water from month one. If a genuine one-off gets baked in as the new normal, you end up planning around a problem that's already gone.
Getting a clear, honest read on what actually drove this year isn't a delay before the real planning work starts, it is the real planning work. Everything after it gets easier and more accurate once it's done: revenue assumptions are grounded in what's real rather than what you hoped for, cost lines reflect what's actually structural rather than last year's guesswork carried forward, and the number you eventually commit to for 2027 is one you can actually stand behind in a board conversation, not just one that felt achievable on a Tuesday afternoon.
Where to start
If you're staring at your 2026 numbers and you're not entirely sure which of the surprises were one-offs and which are here to stay, that's exactly the gap a 2026 Reforecast is built to close. A focused 90-minute session to work through this year's variances properly, understand what they mean, and turn that into a solid, realistic foundation for building your 2027 budget on.
