A guide to rising costs and forecasting for owner-managed businesses

Costs are rising across almost every line of a business. The directors who manage it best are the ones who see it earliest.

For owner-managed businesses, the challenge is not that costs are rising. Most directors already know that. The challenge is that cost increases are arriving from multiple directions at the same time. Employment costs, raw materials, energy, insurance, regulatory compliance, and the combined effect is harder to see clearly until it has already started to erode margin.

Many businesses still rely on annual budgets set at the start of the year and management accounts that arrive weeks after the period has closed. That approach works when conditions are stable but when costs are moving quickly, it leaves directors looking at numbers that are already out of date and making decisions based on a picture that no longer reflects reality.

Why are business costs rising so fast?The cost environment for UK businesses has shifted materially over recent years, and the pressure is not easing. National Insurance contributions increased in April 2025 and the National Living Wage continues to rise, pushing wage bills higher even where headcount has not changed. Energy costs remain elevated compared to pre-2022 levels whilst materials and supply chain costs, while more stable than during the worst of the disruption, have not returned to where they were. Insurance premiums, professional fees, software costs and compliance obligations have all moved upward.

These are not small changes for any business; however, our experience is that it particularly impacts those businesses in the £2 million to £7 million turnover bracket. A three or four percent increase across several cost lines at once can take tens of thousands of pounds off the bottom line in a single year. The difficulty is that no single increase looks dramatic on its own. It is the accumulation that catches businesses out, particularly when the increases are spread across different categories and different points in the year.

How do I spot margin erosion before it hits my profit?The most common problem is not that margin erosion happens, but that it happens quietly and often unseen. A director reviewing quarterly management accounts may see that profit is lower than expected, but by that point, the erosion has already been baked into the results. The cost has been incurred, the pricing has already been set, and the contracts have already been delivered at the old terms.

Late visibility is expensive because it narrows the options available. A director who can see three months ahead has time to adjust by reviewing pricing, renegotiating supplier terms, restructuring the team or to defer a commitment or reallocate resource. If they find out after the quarter has closed those options have already passed and may already be partway through the next one on the same terms.

The businesses that manage cost pressure best are not necessarily the ones that react fastest, but the ones with the clearest view of where margin sits today and where it is heading. That visibility comes from the quality and timeliness of the financial information, not from working harder or checking the bank balance more often.

How can I forecast costs in my business?Good forecasting for an owner-managed business does not need to be complicated. It needs to be current, realistic and reviewed regularly. The starting point is a rolling forecast that updates as conditions change, rather than a static annual budget that becomes outdated within weeks of being set.

A rolling forecast takes the known position (with actual results to date) and provides a projection based on what is expected to happen over the coming months. It incorporates cost increases that are already confirmed, revenue that is contracted or expected, and assumptions about timing. Crucially, it can be updated when something changes such as a supplier increases prices, a contract is delayed or a new hire starts earlier or later than planned.

Scenario modelling adds another layer of visibility and control to operations. The key questions to ask are; What happens to margin if a key material cost rises 10%? What happens to cashflow if a major customer extends payment terms by 30 days? What happens to the wage bill if the next National Living Wage increase is higher than expected?

This does not require complex software or a full-time FP&A function. It requires disciplined financial information, a clear model that connects the key cost and revenue drivers, and regular review with someone who can challenge the assumptions.

Why is my business profitable but has no cash?This is one of the most common and most dangerous questions in an owner-managed business. Profit and cashflow are not the same thing, and the gap between them is where many businesses get caught out, particularly when costs are rising.

A business can report a healthy profit on paper and still face a cashflow squeeze. The reasons are usually structural

• Customers paying later than assumed
• Stock levels creeping up
• VAT and PAYE liabilities building between payment dates
• Capital expenditure funded from trading cash
• Loan repayments reducing the bank balance while not appearing on the profit and loss account
   

When costs rise, the cashflow impact often arrives before the margin impact is visible. Wages and materials are paid in real time whilst revenue from that work may not arrive for 30, 60 or 90 days. That mismatch is manageable when margins are comfortable, but it becomes a real pressure point when margins tighten and overheads increase.

The good news is that cashflow modelling makes this visible. A good cashflow forecast does not just show the expected bank balance but instead shows the timing of inflows and outflows. It answers the question that matters most to a director: not just whether the business will be profitable, but whether there will be enough cash to meet commitments when they fall due.

Directors who operate without a cashflow forecast are effectively navigating by the bank balance alone.

What are a director’s financial responsibilities?Directors of UK companies have a legal obligation to understand the financial position of the business. Under the Companies Act 2006, directors must exercise reasonable care, skill and diligence, and must act in a way that promotes the success of the company. That includes having a sufficient understanding of the financial position to make informed decisions.

Where a company is in financial difficulty, or approaching it, the duties shift further. Directors must consider the interests of creditors and ensure the business is not trading while insolvent. Wrongful trading provisions mean that directors can face personal liability if they allow a company to continue trading when they knew, or ought to have known, that there was no reasonable prospect of avoiding insolvency.

This is not just a risk for businesses in obvious distress. It is relevant whenever cashflow is tight, costs are rising and the director is not entirely clear on the forward financial position. The absence of a forecast does not protect a director. It undermines the argument that they were acting with reasonable diligence.

Forecasting and cashflow modelling are both commercial and governance tools which help a director demonstrate that they were monitoring the financial position, modelling forward scenarios and taking decisions based on reliable information.

When should I get advisory support for cashflow and forecasting?The businesses that get the most value from advisory support are not the ones that call when cashflow is already tight but those that understand how important good visibility is.

Good advisory support in this area is not about producing more reports. It is about helping the director understand what the numbers mean, where the business is exposed, and what decisions need to be made. That includes reviewing margin movement, identifying where costs are drifting, testing whether pricing still works, modelling the cashflow impact of commercial decisions and making sure the director has a reliable forward view.

For owner-managed businesses, this is particularly valuable because the director is often too close to the day-to-day operation to step back and see the broader picture. An adviser who understands the business brings context to the number, identifies pattern recognition across similar businesses, and offers experience of what happens when certain pressures are left unmanaged, all while challenging assumptions constructively.

What should I consider?Before the next quarter closes, ask yourself: Do I know where my margin is going, and do I have a cashflow forecast I trust?

If the answer is no, or if the information is late, incomplete or based on assumptions that have not been reviewed, that is the point at which the risk starts to build.

Final thought

For owner-managed businesses, the value of good advisory is not just in the numbers. It is in having someone who understands the business, checks the assumptions, models the forward position and helps the director make decisions with confidence rather than uncertainty.

How can we help?

At Oldfield Accountancy & Advisory, we help business owners take control of their numbers with practical forecasting, cashflow modelling and regular advisory review. If costs are rising, margins are under pressure or you want a clearer forward view of your financial position, Lloyd and Arron in our advisory team can help you build the visibility and confidence you need to make better decisions earlier.

Please note: This article is for general information purposes only and was correct as at the time of writing (02/06/26) and does not constitute financial advice. Tax rules and legislation are subject to change, and their application depends on your individual circumstances. We recommend seeking advice from a suitably qualified tax adviser. No responsibility for loss occasioned by any person acting or refraining from action as a result of the material contained in this article can be accepted.