How to manage a construction project,step by step.

By the I-Cost team · Published 22 October 2026

Managing a construction project well is mostly about one thing: knowing, every week, whether the job is still going to make the money you priced it to make. Programmes, site meetings and paperwork all matter, but they serve that question. This guide walks through the steps in the order they happen on a typical job.

1. Win the work at a price you can deliver

Everything starts with the estimate. Check the client's bill of quantities (BOQ) for errors and missing items, price it with current rates from your suppliers and subcontractors rather than last year's, and add a realistic allowance for preliminaries, overheads and risk before your margin. UK material prices rose 6.4% in the year to August 2026, so rates copied from an old job can be wrong before you start. Our guide to pricing a BOQ goes through this in detail.

2. Agree the contract sum, and write it down

Clients often negotiate a discount between tender and award. Record the final agreed contract sum, the revision of the quotation it came from and why it changed. That agreed figure, not your original estimate, is what your margin is measured against.

3. Turn the estimate into a budget

Once the price is agreed, freeze the estimate at cost as the project budget, split by area, package or cost code. Every order, invoice and hour from now on is compared with it. Keep each approved version; if the scope changes, approve a new version rather than editing the old one.

4. Plan the programme

Put start and end dates against each section of work, and note long-lead items that need ordering early. A simple programme that is kept up to date is worth more than a detailed one nobody opens.

5. Buy well

For each package, ask at least two or three suppliers or subcontractors to price the same items and quantities, with the same delivery dates. Compare them like for like: carriage, lead times, exclusions and payment terms, not just the headline price. See managing suppliers and subcontractors.

6. Commit money only through orders

Place a written purchase order (or subcontract order) before work or delivery, and record its value against the budget the moment it is sent. That is when the money is committed, not when the invoice arrives weeks later.

7. Track labour every day

Labour is usually the hardest cost to see. Get hours recorded daily against the right items, approved weekly, and costed at real rates. Paper timesheets that arrive at the end of the month hide overspend until it is too late.

8. Record deliveries and match invoices

Check each delivery against the order and note anything short, damaged or wrong straight away. Pay invoices against what was ordered and received; goods received but not yet invoiced are an accrual you still owe.

9. Forecast, don't just report

Every week or month, work out the forecast final cost: for each area, the budget, or what is already committed if that is more, plus anything still to come. Compare it with the agreed contract sum to get the forecast margin. Many contractors do this as part of a monthly cost value reconciliation (CVR).

10. Act on what the numbers say

A forecast is only useful if someone acts on it. Look at the areas where committed cost is close to or over budget, find out why, and decide what to do while there is still time: rebuy, re-sequence, recover the cost from the client or accept it.

Doing it without five different tools

Most of the work above goes wrong in the gaps between spreadsheets, email, paper timesheets and accounts. I-Cost keeps the estimate, agreed price, budget, supplier quotes, orders, deliveries, hours, programme and forecast margin in one place, following the same eight steps on every project. See how it works.

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