Payment Application Discounts in Construction Explained

A discount percentage on a construction payment application reduces the gross valuation before retention and other deductions are applied. While not as common as retention, discounts appear in many construction contracts and can have a significant impact on your interim payments.

What Is a Discount on a Payment Application?

A discount is a contractually agreed percentage reduction applied to the gross value of work on each payment application. It is deducted from the total before retention, deposits, and other adjustments are calculated.

Discounts in construction typically arise from:

• Competitive tendering: the subcontractor offered a percentage discount to win the contract
• Early payment incentives: a discount in exchange for faster payment terms
• Volume agreements: a reduced rate for a larger scope of work or ongoing relationship
• Value engineering: a negotiated reduction where an alternative specification reduces cost

How Discounts Are Calculated

The discount is applied to the gross valuation on each payment application. Here is an example:

• Contract value: £200,000
• Discount percentage: 2.5%
• Application gross value: £50,000
• Discount deduction: £1,250 (50,000 x 2.5%)
• Net value after discount: £48,750
• Retention (5%): £2,437.50
• Amount due: £46,312.50

The discount is applied before retention, which means the retention is calculated on the discounted amount, not the original gross value.

When Should You Set a Default Discount?

Setting a company-wide default discount makes sense if:

• You consistently offer the same discount percentage across projects
• Your standard terms include a prompt-payment discount
• You want to ensure the discount is never forgotten when creating new projects

If your discount varies from project to project, leave the company default at 0% and set it individually on each project.

Discounts vs Other Deductions

It is important to distinguish discounts from other common deductions on payment applications:

• Retention: a percentage held back as defect insurance, released after completion
• Discount: a contractual reduction in the gross valuation, applied on every application
• Contra charges: one-off deductions for costs the client has incurred on your behalf (e.g. site cleaning, skip hire)
• Deposit deductions: offsets against an advance payment or mobilisation payment made at the start of the contract
• CIS deductions: tax deducted at source under the Construction Industry Scheme (20% or 30%)

Tips for Managing Discounts

1. Record it in the contract: always ensure the discount percentage is clearly stated in writing before work begins
2. Apply it consistently: the discount should appear on every interim payment application, not just the final account
3. Check the calculation order: confirm whether the discount is applied before or after retention, as this affects the final amount
4. Track the cumulative impact: on a large contract, even a small discount percentage adds up to a significant sum

Frequently Asked Questions

Is a discount the same as a variation?

No. A variation changes the scope or specification of work, which may increase or decrease the contract value. A discount is a fixed percentage reduction applied to the agreed value of work without changing the scope.

Can I remove a discount mid-project?

Only if both parties agree to a contract amendment. A discount agreed in the original contract terms cannot be unilaterally removed by either party.

Does VAT apply to the discounted or original amount?

VAT is calculated on the discounted amount. Since the discount reduces the consideration for the supply, the VAT base is the value after the discount is applied.