The Order That Fits: Three Figures to Check Before Committing to a Large Contract

A large order is rarely just a sales decision. For an SME, it is a commitment to deliver, to fund and to absorb risk. The commercial appeal is obvious: revenue, credibility and momentum. The danger is equally clear. A contract that is too big for the operating model can turn a promising year into a cash-flow problem, a service failure or an uncomfortable dependence on one buyer.

Before saying yes, it helps to replace instinct with three figures. They do not require a finance team or a complex model. They require an honest look at what the business can actually absorb.

First figure: available capacity, not total capacity

Most owners know how busy the business is. Fewer can state, with confidence, how much genuine headroom remains. Total capacity is a misleading number because it assumes every machine, shift and person can be pushed to the limit without consequence. Available capacity is the portion that can be sold without damaging existing commitments, quality or lead times.

Start with current utilisation across the constraint that matters most. In a manufacturing firm it may be a specific machine or a skilled operator. In a service business it may be a delivery team, a project manager or a compliance bottleneck. If that constraint is running at 84 per cent, the business does not have 16 per cent of spare capacity in any practical sense. It has 16 per cent before contingency, maintenance, absence and the unexpected work that always arrives.

A useful rule is to hold back part of the apparent headroom. If the new order would consume more than half of the remaining capacity over its delivery period, the business is not adding work to a stable base. It is removing its ability to recover from disruption.

Second figure: the cash conversion cycle under the new order

Revenue is not cash. A large order often brings larger upfront costs: materials, subcontractors, additional staff, tooling, insurance or extended payment terms. The question is not simply whether the order is profitable. It is whether the business can fund the gap between paying for delivery and being paid by the customer.

Calculate the cash conversion cycle for the order as if it were a standalone project. How many days pass between the first significant outflow and the final receipt? What is the peak funding requirement? That peak, not the annual contract value, is the number that matters. A contract worth £450,000 may require £95,000 of working capital at its tightest point. If the bank facility has £60,000 of headroom, the order is not yet financeable without a change in terms.

UK SMEs should also test the order against existing commitments. A large contract that lands in the same quarter as VAT, payroll and a seasonal dip can create a squeeze even when the order itself is sound. The cash conversion cycle should be reviewed alongside the current facility, debtor days and the reliability of the customer's payment history.

Third figure: the concentration effect

A large order from an existing customer can be welcome, but it changes the shape of the business. If one customer moves from 14 per cent of revenue to 24 per cent, the firm has not just grown. It has become more dependent. That dependency affects negotiating power, pricing, payment terms and the damage caused by a delayed project or a lost account.

Concentration is not automatically bad. Some SMEs deliberately build deep relationships with a small number of anchor clients. The risk is unmanaged concentration, where the owner has not priced the dependence or prepared for its consequences. Set an internal threshold before the order is signed. If the contract pushes a customer beyond that threshold, treat it as a strategic decision rather than a routine sale.

A worked example

Consider a West Midlands precision engineering firm with turnover of £2.4 million. Its main constraint is a CNC machining cell running at 84 per cent utilisation. Its largest customer represents 16 per cent of revenue. Cash conversion currently runs at 58 days, and the overdraft facility has £70,000 of headroom.

A customer offers a £600,000 contract to be delivered over nine months. On paper, it is a strong order. The three-number test tells a more nuanced story.

First, the order would require approximately 24 per cent of annual capacity. With only 16 per cent apparent headroom, the firm would need overtime and a subcontractor for several months. That is possible, but it removes the buffer needed for existing customers and machine breakdowns.

Second, the order carries material and subcontract costs of £210,000, with payment at 60 days after each milestone. Peak funding need is estimated at £110,000 in month four. That exceeds the available facility by £40,000 unless terms change.

Third, the customer would rise from 16 per cent to 23 per cent of revenue. That is above the firm's informal 20 per cent threshold and would increase dependence at the same time as delivery risk.

The order is not rejected. It is renegotiated. The firm proposes a 60/40 split across two phases, a 30 per cent deposit, milestone payments at 30 days and a capacity reservation fee. The customer accepts a smaller first phase. The business protects existing service levels, reduces peak funding and keeps concentration below its threshold.

A decision checklist

Before signing a large order, confirm the following:

• The binding constraint has been identified, not just overall workload.
• Available capacity has been calculated after contingency, not at theoretical maximum.
• The order's peak cash requirement is known and matched by a confirmed facility.
• Payment terms have been tested against the firm's own payment obligations.
• The customer's post-order share of revenue is within a deliberate threshold.
• Existing customers have been considered, not treated as a residual claim on capacity.
• A staged, phased or deposit-led alternative has been prepared before negotiation.

The purpose of the three-number test is not to make an SME timid. It is to make the yes decision deliberate. A large order should strengthen the business, not merely enlarge it. When capacity, cash and concentration are understood in advance, the owner can negotiate from evidence rather than hope — and accept the work that the business can genuinely deliver well.