How Much Should You Spend on a Tender? A Bid ROI Guide for SMEs

A £200,000 contract sounds like an opportunity worth pursuing. But how much should you actually spend trying to win it? £500? £2,000? £10,000? The headline contract value alone doesn’t give you the answer.

For SMEs in particular, every tender involves a trade-off. Time spent writing method statements, gathering evidence and reviewing documents is time that could have been spent delivering work or developing the business elsewhere. The aim, therefore, shouldn’t be to bid as cheaply as possible. It should be to invest an amount that makes commercial sense given the potential return.

Why tender value alone can be misleading

Contract value is an obvious place to start when deciding how much resource to commit to a bid, but it can also be deceptive. A £500,000 contract isn’t necessarily worth £500,000 to your business. You need to consider what you are likely to earn after the costs of actually delivering the work. That means looking at factors including:

• The expected profit margin
• The length of the contract
• Whether the stated value is guaranteed or represents a maximum potential spend
• Mobilisation and implementation costs
• Additional recruitment, equipment or accreditation you may need
• The likelihood of extensions or repeat work

There can also be strategic value beyond immediate profit. Winning your first contract with an NHS trust, local authority or central government department, for example, could provide useful evidence and references for future tenders.

The reverse is also true. A seemingly attractive contract may carry a very tight margin or require significant upfront investment. Spending heavily on the bid purely because the headline contract value is large could therefore result in poor return on investment. This is why a good bid/no-bid decision should consider what winning would genuinely be worth to your business.

What does it really cost your business to bid?

The amount you pay an external consultant is only one part of the cost of bidding. Even if you write the entire submission internally, the tender isn’t free. Imagine that a tender takes your team 60 hours to complete. Those hours might include input from a director, operations manager, finance lead and several subject matter experts. If those people would otherwise be working on client delivery, sales or other business priorities, their time has a commercial value.

Your total bid cost could include:

• Management time: qualifying the opportunity, planning the response and making strategic decisions.
• Writing time: drafting method statements and responding to quality questions.
• Subject matter expert input: explaining operational processes, technical delivery methods and previous experience.
• Commercial input: building pricing schedules, checking assumptions and reviewing contract terms.
• Supporting evidence: updating policies, collecting case studies, producing CVs and finding relevant performance data.
• Review and submission: checking compliance, proofreading answers, uploading documents and completing portal requirements.

For some opportunities, using professional bid writing services can actually reduce the internal cost by allowing senior staff to concentrate on the information only they can provide, rather than asking them to turn that information into polished tender responses as well. The important point is to measure both external spend and internal resource.

A simple way to calculate bid ROI

Bid ROI doesn’t need to involve a complicated financial model. A useful starting point is:

Potential contract profit × realistic probability of winning = expected value of the opportunity

You can then compare that expected value against what preparing the tender is likely to cost.

Suppose you are considering a contract worth £200,000. Your expected margin is 15%, giving you:

£200,000 × 15% = £30,000 potential profit

You then assess the opportunity and believe you have a realistic 25% chance of winning:

£30,000 × 25% = £7,500 expected value

If preparing the bid is likely to cost your business £3,000 in internal and external resource, the investment may be reasonable. If the same bid would cost £8,000 to pursue, the equation becomes much harder to justify.

This isn’t a prediction that you will receive £7,500. Tender outcomes are binary: you either win the contract or you don’t. The calculation simply gives you a consistent way to compare opportunities and make better investment decisions. It also prevents emotion from taking over. A large contract can be exciting, but excitement isn’t the same thing as commercial viability.

How realistic is your chance of winning?

The probability figure is where judgement becomes particularly important. Simply deciding that every tender gives you a 25% chance of success won’t tell you very much. Your estimated chance of winning should reflect the strength of that particular opportunity. Start by asking:

1. Can we meet every mandatory requirement? If you can’t satisfy a pass/fail condition, there may be little point investing further.
2. Do we have relevant experience? Buyers generally want evidence that gives them confidence in your ability to deliver.
3. Can we demonstrate measurable results? Strong claims become much more persuasive when backed by evidence.
4. How competitive is our offer? Consider both quality and price rather than assuming a good technical response alone will win.
5. Is the contract suitable for a company of our size? Think about capacity, turnover requirements and mobilisation risk.
6. Do we understand the buyer’s priorities? Previous engagement, market knowledge and careful tender analysis can all strengthen your position.
7. Do we have enough time to respond properly? An otherwise strong opportunity can become a weak one if the deadline leaves insufficient time to produce a competitive submission.

There is some positive context for smaller suppliers. Current government guidance on the Procurement Act explains that contracting authorities must consider the particular barriers SMEs may face before inviting tenders and whether those barriers can be reduced or removed. The official Procurement Act learning guidance provides further detail on that requirement. That doesn’t mean SMEs should bid indiscriminately. It means size alone shouldn’t be the reason to dismiss an otherwise well-matched opportunity.

So how much should an SME actually spend on a tender?

There isn’t a universal percentage of contract value that every SME should spend. The appropriate budget should reflect the value, profitability, complexity and likelihood of winning the individual opportunity.

A lower-value, straightforward opportunity

Keep the bidding process proportionate. If you already have strong case studies, policies and standard company information, reuse them intelligently rather than starting again. Limit senior management involvement to the questions where their knowledge is genuinely required. You may not need a fully outsourced service at all.

A valuable opportunity you have a strong chance of winning

Greater investment may be justified. If better planning, professional writing or an independent review could materially improve the quality of your submission, the additional cost may be small compared with the potential return from winning. A professional bid review can also be a proportionate option where your team is capable of drafting the tender but would benefit from an experienced second pair of eyes before submission.

A major strategic opportunity

For a complex, high-value or business-critical tender, the cost of comprehensive support may represent only a small proportion of the potential return. This is where bid management support can become more appropriate, particularly if several stakeholders need coordinating or the submission involves substantial compliance, planning and quality assurance.

The principle remains the same in every scenario: match your investment to the opportunity rather than adopting the same bidding process every time.

When spending less can improve your bid ROI

Improving ROI doesn’t necessarily mean winning more contracts. Reducing the cost of pursuing each suitable opportunity can also improve the equation. For example, you could:

• Build a library of strong reusable evidence rather than repeatedly searching for the same information.
• Ask operational experts for focused technical input instead of expecting them to write complete responses.
• Use previous tender feedback to strengthen areas that consistently score poorly.
• Pay for an external review rather than full writing support where you already have a capable internal team.
• Use first-draft support for tenders where fully outsourcing the process wouldn’t be commercially proportionate.

At Bid Writer Consultancy, this was one of the reasons we developed our first-draft bid writing service for SMEs. It provides up to 8,000 words of professionally overseen first-draft responses for a fixed £1,500 + VAT, designed particularly for opportunities where SMEs need to keep the economics of bidding under control. You still review, tailor and finalise the content internally, but you don’t have to allocate the same amount of staff time to creating every response from scratch.

That model won’t suit every tender. For a major strategic procurement, fuller support may make considerably more sense. The point is to have different levels of resource available for different levels of opportunity.

Lower-value public sector contracts can still offer strong ROI

Lower contract value shouldn’t automatically mean lower priority. In some circumstances, smaller opportunities can be particularly attractive to SMEs because they fit existing capacity, require less mobilisation and provide a route into public sector supply chains without taking on excessive delivery risk.

The rules surrounding below-threshold public procurement also provide buyers with greater flexibility. Current Cabinet Office guidance explains that authorities may, depending on the circumstances and applicable policies, use approaches such as targeted quotations or restrict some below-threshold competitions to SMEs or VCSEs. Government guidance on below-threshold contracts also confirms the requirement to consider barriers faced by SMEs for relevant below-threshold procurements.

Central government guidance additionally provides mechanisms for certain below-threshold competitions to be reserved to UK or local suppliers. PPN 005 on reserving below-threshold procurements sets out those options for relevant contracting authorities.

For an SME, a £75,000 opportunity that fits neatly into existing capacity can therefore sometimes be more attractive than a £750,000 contract that would stretch the business operationally and require a much larger bid investment. It comes back to the same question: what will this particular contract be worth to us if we win it?

Match your bid support to the opportunity

Not every tender requires the same solution. Think of bid support as a spectrum:

Write internally → external review → supported first draft → full bid writing → full bid management

If your team writes strong bids but lacks confidence in a particular submission, a review may be enough. If you can provide all the underlying evidence but struggle to find the time to draft thousands of words of quality responses, first-draft support may provide better ROI. Meanwhile, if the opportunity is particularly valuable or complex, outsourcing more of the writing and management may allow your team to concentrate on technical input, pricing and strategic decisions.

Bid Writer Consultancy works across these different levels because SMEs don’t all need the same thing, and neither do individual tenders. What makes commercial sense for a £50,000 contract may be completely different from the right approach to a £2 million framework.

Five questions to ask before investing in your next bid

Before committing significant time or money to an opportunity, ask:

1. What profit could the contract realistically generate?
2. How strong is our genuine probability of winning?
3. What will preparing the tender cost internally as well as externally?
4. What level of bid support is proportionate to the opportunity?
5. Is this the best use of our bidding resource right now?

These questions won’t remove all uncertainty from tendering. Nothing can guarantee that a buyer will select your submission. They can, however, help you avoid two expensive mistakes: underinvesting in an excellent opportunity or pouring too much resource into one that was never commercially attractive in the first place.

The question isn’t simply whether you can afford professional bid support. It’s what level of investment the opportunity justifies.

If you have a tender you’re considering and aren’t sure what level of support makes commercial sense, Bid Writer Consultancy can help you assess the opportunity and choose an appropriate approach. From first drafts and bid reviews through to complete writing and management, we’ll help you concentrate your resource where it can add the most value. Contact Bid Writer Consultancy to discuss your next tender.