Bills approved in a hurry become disputes in a hurry. A short workflow protects both sides.
Raise against a work order
Every bill should link to a work order and a measurable delivery. Bills without a link need explanation.
Verify and approve
Site confirms work or material, finance checks amounts and a named approver signs off.
Pay and record
Mark paid with date and reference. Propto approves bills before payment so unapproved bills are not paid.
Why bills need a workflow
Vendor bills arrive from contractors, suppliers and consultants. Without a defined workflow, bills are paid late or early, duplicated, or approved without checking that work or material was actually delivered. Each mistake affects cash flow and vendor relationships.
A clear approval workflow connects each bill to the work it covers and routes it to the right approvers.
Raise against a work order
Each bill should reference a work order or purchase order that defines what was agreed: scope, quantity, rate and terms. Bills without a reference should be questioned before processing.
The link makes it easy to check whether the amount billed matches what was agreed.
Verify delivery or progress
Before approval, confirm that material was received and verified, or that work progress was approved on site. Bills should not be approved for undelivered material or unapproved work.
Show verification and progress status alongside the bill, so approvers do not need to search.
Approval levels
Set approval levels by amount and type, for example site in-charge for small bills, project manager for medium and management for large amounts. Clear levels speed up routine bills and protect against large errors.
Record each approval with name and date.
Avoiding duplicates
Duplicate bills, whether accidental or not, are a common source of overpayment. Check bill numbers, amounts and dates against previous bills from the same vendor before approval.
A system can flag possible duplicates automatically.
Pay and record
Once approved, schedule payment according to the terms and record payment details: date, amount, mode and reference. Inform the vendor.
Keep bill, approvals and payment on one record for easy reference.
Reporting for management
Report bills by status: received, under review, approved, paid and overdue. Management can see liabilities, plan cash and spot bottlenecks in approval.
Report by vendor too, to understand spend and payment performance.
Why it matters for the business
Accurate, timely bill processing protects cash, prevents overpayment and builds good relationships with vendors who rely on predictable payments. Reliable vendors are essential to keeping construction on schedule.
Good records also make audits faster and less stressful.
Getting the team involved
Site teams confirm delivery and progress, project managers review scope, accounts checks amounts and terms, and management approves large items. Each needs a clear view of what they are approving.
Train teams on what to check at their level.
Building the habit
Make the workflow the only route to payment. Bills arriving by email or in person should be entered into the system first. When every bill follows the same path, exceptions become visible.
Review the approval queue weekly so bills do not wait unnecessarily.
A worked example
A contractor submits a bill referencing a work order for plastering. The site in-charge confirms the approved progress, the project manager checks the rate and quantity and accounts verifies the bill number is new. The bill is approved, payment is scheduled and the contractor is informed.
A week later, the same bill number arrives again; the system flags it and accounts rejects it as a duplicate.
Common mistakes
Common mistakes include bills without work order references, approval before delivery verification, unclear approval levels and payments recorded outside the system.
Another mistake is slow approval, which strains vendor relationships.
Questions teams often ask
Should advances be handled differently? Yes, with their own approval and later adjustment against bills.
How quickly should bills be approved? Set targets by amount and track against them.
A bill workflow checklist
Every bill linked to a work or purchase order. Delivery or progress verified first. Approval levels by amount. Duplicate checks.
Payment recorded with reference. Reports by status and vendor. Weekly queue review.
In practice
Start by requiring work order references and delivery verification for all new bills. Define approval levels, then move all incoming bills into the system.
Review the first month’s bills with accounts and adjust levels or checks as needed.
In short
Link bills to work orders, verify delivery or progress, approve by clear levels, check for duplicates, record payments and review the queue weekly. Vendors are paid correctly and on time, and cash is protected.
Why it matters for vendors
Vendors plan their own cash flow around your payments. Predictable approval and payment build loyalty, and loyal vendors prioritise your sites when materials are scarce or labour is stretched. Slow or inconsistent payment does the opposite.
Communicate approval status to vendors so they know where their bill stands. A short message when a bill is approved, and another when it is paid, reduces chasing calls and strengthens the relationship.
Over time, a reputation for fair, timely payment becomes a competitive advantage when you need vendors most.
In one line
Every bill, one path, clear checks and timely payment.
Review the queue every week.
Do bills need approval first?
Yes. Bills are approved before payment.