Most trusts I speak to will say the same thing about years two and three of their budget. They know it. They submit it. But they do not really trust it. The numbers were built quickly, assumptions were copied from the year before, and whatever balancing act was needed to get it over the line was done without much scrutiny. It goes in because it has to.
That is not a criticism. It reflects the reality of what budget season looks like for finance teams in most trusts. Year one gets the attention. Years two and three get what is left.
But the problem with treating the three-year budget as a compliance exercise is not just that the numbers are not accurate. It is that the document stops doing its most important job.
The earliest warning system you haveÂ
Your multi-year budget is the earliest financial warning system available to you and your trustees. When it is built on shaky assumptions, it stops warning you about anything. Challenges that could have been identified months earlier get missed entirely, because the picture being presented was never a real one.
When I worked in a central finance team, my instinct was always to be cautious. Build in a little extra headroom. Assume costs would rise faster than income. Over time, though, I came to understand that excessive caution creates its own problems. If your modelling shows a structural deficit that was never really there, the conversations you are having with senior leaders and trustees today will be shaped by a picture that does not reflect reality. That has consequences.
Take staffing as an example. A common assumption in trust budgets is that the staffing structure stays fixed year on year, with every member of staff progressing up the pay scale. In practice, staff turnover means new starters come in at lower points. Some of that progression gets offset. A budget that ignores this will consistently overstate staffing costs in future years, skewing your trajectory before you have even started modelling scenarios.
What separates a reliable three-year budget from one that isn’tÂ
The weakest three-year budgets tend to share the same patterns. Identical figures copied forward into future years. A blanket percentage uplift applied across every row. No record of what assumptions were made or where a particular number came from. When you look at them, there is no audit trail. Anyone interrogating the figures has nowhere to start.
The strongest ones are the exact opposite. Every significant budget line has a note. You can see what it was based on, who made the decision, and what was known at the time. That level of detail means senior leaders and trustees can actually interrogate the figures rather than having to take them on trust. It creates confidence in the numbers that no amount of balancing will give you otherwise.
A framework worth working toÂ
One of the most practical ways to think about a three-year budget is to treat each year differently, because each year genuinely is different.
Year one is your working budget. Every line has been intentionally reviewed. Costs have been appropriately modelled. This is where your rigour sits.
Year two should focus on what you actually know. Are there confirmed staffing changes or restructuring costs? Any contract renewals that need to be reflected? What are the current sector conversations around pay awards? Lock in what is confirmed, and clearly label everything else as an assumption. That honesty is a strength, not a weakness.
Year three should be directional. You are not trying to predict the future in detail. You are trying to understand the trajectory. Is the trust moving towards a stronger or weaker financial position? Are there structural pressures building that need strategic attention now? That is the question year three should help you answer.
From something you submit to something you rely onÂ
The goal is not a perfectly balanced document. The goal is a document that you and your trustees can reasonably stand behind. One that has been scrutinised enough to support real strategic decisions. One that does not get filed away after submission and forgotten until the following year.
When trusts get to that point, something shifts. The three-year budget stops being something you present nervously and starts being something that actively shapes the conversations you have with senior leaders and trustees throughout the year. It becomes a planning tool rather than a compliance one.
That shift does not require a complete overhaul. It starts with being deliberate about assumptions, honest about what you know versus what you are estimating, and building in enough substance that the numbers mean something when someone looks at them.
Budget season does not have to feel like this every year. If the three-year budget has become something your trust submits rather than something it relies on, that is worth fixing before the next cycle begins. The foundations are not difficult to put in place. They just need to be deliberate.
More than 570 MATs already plan with confidence using IMP Planner. Payroll-led staffing baselines, shared trust-wide assumptions and multi-year scenario modelling built specifically for how MATs operate.
If you want to see what a calmer, more controlled budget cycle looks like in practice, book a demo with our team and explore IMP Planner. Next year’s budget season starts now.
