No fluff - just straight guidance on quoting, job costing, purchase orders, invoicing, CIS, VAT and keeping multi-week projects under control.

Role-based approvals sound tidy, but job value and exception routing are what keep construction spend moving without losing control of the commitment.

Duplicate POs usually appear when site, office, and suppliers are working from different confirmations. One live record, one approver, and one reference rule keeps the job clean.

Duplicate purchase orders usually appear when site, office, and supplier confirmations drift apart. One live record, one approver, and one reference rule keep the commitment clean.

A weekly committed cost review gives contractors a clearer view of what has been approved, what is still open, and what will hit the job next.

A PO should not be approved on instinct alone. The approver needs a clear scope, job reference, value, and exception trail before the order becomes a live commitment.

Plant hire bills often arrive after the job has already moved on. A simple live record for the hire start, off-hire date, site, and approval keeps the cost visible before month-end surprises.

An approved PO is only useful if the supplier actually receives it. Missing the send step can create delays, duplicate follow-up, and invoices that arrive before the commercial record is complete.

One absent approver can stall materials, labour and subcontract packages. A simple approval chain keeps decisions moving and shows who can sign what when the usual reviewer is away.

A commercial handover sheet keeps job references, approvals, and invoice status together so site and accounts are not working from different versions of the truth.

Small site spends still need a proper job reference. Capture receipts while they are fresh, keep them on the right job, and stop small costs drifting.

PO revisions are normal on live jobs. The risk is not the change itself — it is losing the original value, the reason for the update, and the approval trail before accounts sees the invoice.

Variation instructions often start in WhatsApp, email, or a site conversation. A single log gives the business one trusted record before the cost reaches accounts.

If invoices, delivery notes, and small purchases arrive with different references, job costing breaks fast. One project-code rule keeps the paperwork attached to the right job.
One job can pick up several names across site, office, and supplier paperwork. A simple reference rule keeps the right cost on the right job.

One job can pick up several names across site, office, and supplier paperwork. A simple reference rule keeps the right cost on the right job.

One job can pick up several names across site, office, and supplier paperwork. A simple reference rule keeps the right cost on the right job.


Unapproved variations create a quiet cash flow problem: the work gets done, the cost lands, and the money is still stuck in approval limbo. Here’s how to tighten the process.

If a PO system only issues numbers, it is not doing enough for construction. The useful part is the data it captures and keeps visible.

One supplier invoice can belong to more than one job. The fix is a clear split allocation, not a guess in accounts after the cost has already landed.

On fit-out jobs, a generic site name is not enough. Room and zone references make it easier to match POs, variations, and invoices to the right part of the job.

If invoices, delivery notes, and small purchases arrive with different references, job costing breaks fast. One project-code rule keeps the paperwork attached to the right job.

A weekly committed cost review gives contractors a clearer view of what has been approved, what is still open, and what will hit the job next.
A spend report can show what has already happened. Control means knowing what is committed, approved, and still open before the invoice lands.

WhatsApp is quick for site communication, but it is a poor place to store commercial approvals. Contractors need a simple rule for turning chat requests into proper purchase orders before spend starts drifting.

A purchase order only controls spend if changes are recorded before the invoice arrives. Here is a practical workflow for handling overspend, revised orders, and construction variations without losing sight of the committed job cost.
Put it into practice with BuilderDash - one system for every enquiry, job, quote and invoice.