How to compare service proposals on a like-for-like basis

A service proposal is easier to judge when every supplier is answering the same brief. Start by separating what is included, what is excluded and what you must provide yourself. Only then compare price. A lower quote may be the right choice, but the number means little if it covers a different job.

Build a comparison sheet before reading the prices

Put the outcomes you need in the first column. Add rows for deliverables, deadlines, revisions, support after handover, training and ownership of working files. Give each proposal its own column. Record the exact wording and page number where the supplier addresses a requirement. Mark an unanswered point as “unclear”, not as included.

For example, two website proposals might both promise a new site. One includes writing ten service pages and testing the contact form; the other expects your team to supply all copy and perform final checks. Their headline prices are not comparable until those tasks have been costed.

Separate one-off work from ongoing costs

List setup fees, subscription or maintenance charges, paid extras and the likely cost of changes. Ask what happens if the scope grows. Does a revision mean a small adjustment to agreed work or a new feature? Request an example of how a change would be quoted and approved. Include your own team's time for supplying content, giving feedback and attending meetings.

A useful comparison uses a common period, such as the initial project plus the first year of support. Do not treat an optional service as mandatory just to make one column look fuller. The point is to show the real trade-offs.

Score the evidence, then clarify gaps

Choose a few criteria that matter to this project and give each a simple weight. Evidence of a suitable delivery method might matter more than a polished slide deck. Write a short reason for each score and keep an “unknown” category. A score should start a discussion, not disguise uncertainty as precision.

Send each supplier the same clarification questions. Ask them to confirm answers in the revised proposal or agreement. If testimonials influence your view, check how to evaluate company case studies before treating a selected success story as proof of fit.

Try a short worked comparison

Imagine Proposal A costs £4,000 and includes copy, two review rounds and a month of support. Proposal B costs £3,100 but leaves copy to your team and charges for each revision. Ask your team how many hours it would need for copy and approvals, then request the supplier's revision rate. You may still choose B, especially if you already have strong content. The comparison simply shows the work you are buying and the work you will do. Keep unresolved costs as a range rather than an invented exact total.

Frequently asked questions

Should I choose the cheapest proposal?

Choose the proposal that meets your priorities at an acceptable total cost. A cheaper proposal can be good value when its exclusions are understood and workable.

How many suppliers should I compare?

There is no useful universal number. Compare enough credible options to understand the trade-offs, but keep the same brief and criteria for each.

What if a supplier will not provide a detailed breakdown?

Ask for the deliverables, assumptions and change process in writing. If material questions remain unanswered, record that uncertainty as part of your decision.