Retentions locked up 5% of contract value for decades, and that money mattered to every crew on site.
The construction retentions ban UK ends that practice.
At Midwest Precast Contractor, our estimators track payment reform because cash flow drives delivery.
For developers, contractors, and property owners, the shift is direct: money moves faster, contracts change, and security terms replace withheld sums.
Detroit Marriott at the Renaissance Center $1.6B Overhaul Means for Precast
Key Takeaways
- The construction retentions ban UK amends the Housing Grants, Construction and Regeneration Act 1996, ending contractual retention deductions.
- A 60-day payment cap and 8% interest above the Bank of England base rate now target late payment across commercial contracts.
- A two-year transition period runs first, followed by a three-year “last retention day” for outstanding sums.
What the Ban Does
The Commercial Payments Bill [HL] entered Parliament on 19 May 2026.
It bans clauses that let firms withhold retention sums.
It also blocks side letters and settlement agreements used to recreate the same effect.
As the Dentons analysis confirms, the reach covers written and unwritten workarounds.
| Provision | Current Rule | After the Ban |
|---|---|---|
| Retention sums | Up to 5% withheld | Prohibited |
| Workaround clauses | Common | Banned |
| Side letters | Used for release deals | Blocked |
| Unauthorised deduction | No fixed penalty | Fixed sum + interest |
| Enforcement | Court / adjudication | Statutory mechanism |
Payment Rules Behind the Ban
The Bill resets payment terms across the supply chain, not just retentions.
The Osborne Clarke briefing calls it the most ambitious late payment legislation in over 25 years.
These caps hit cash flow discipline hard.
| Rule | Threshold | Applies To |
|---|---|---|
| Payment cap | 30 days | Public authorities |
| Payment cap | 60 days | Non-public authorities |
| Late interest | 8% above BoE base | Qualifying contracts |
| Pay Less Notice | 7 days before final date | Construction contracts |
How the Construction Retentions Ban UK Changes Cash Flow
— US News (@Us_news_ways) July 28, 2026
The construction retentions ban UK amends the Housing Grants, Construction and Regeneration Act 1996, ending contractual retention deductions.@BuildUK @CITB_UK @RICSnews https://t.co/V9wu69InwB
Transition Timeline
The rollout runs in stages, not overnight.
Lead times on large projects run long, so planning starts now.
Our teams already flag live frameworks against these dates.
| Stage | Trigger | Effect |
|---|---|---|
| Transition start | Regulations commence | 2-year clock begins |
| Interim clauses | Agreed in transition window | Valid until last retention day |
| Ban in force | End of 2 years | No new retention clauses |
| Last retention day | 3 years from start | Outstanding sums enter statutory payout |
Project Impact
Cleaner contracts mean faster money and fewer release disputes.
But quality leverage shifts to bonds and warranties.
If you have tracked construction payment standards, this change won’t surprise you.
| Pros | Cons |
|---|---|
| Freed cash for subcontractors | QA leverage moves to bonds |
| Fewer disputes over release dates | Contract redrafting costs time |
| Statutory interest protects payees | Frameworks need date mapping |
| Predictable flow for suppliers | Legal spend rises short term |
Preparation Steps
Early movers avoid the scramble.
The Projul payment terms guide shows why tight contract language protects cash flow.
We build on engineering precision, on-time delivery, and Midwest-tough weather resistance, not withheld money.
- Audit every live and proposed contract for retention clauses.
- Map framework agreements against the transition dates.
- Review Pay Less Notice timing against the 7-day rule.
- Plan alternative security: retention bonds, warranties, defect guarantees.
- Brief finance teams on 8% interest exposure.
Construction Retentions to Be Banned Contractors Must Know
FAQ
When does the ban take effect?
- After the two-year transition period begins once commencement regulations start.
Does it apply across the UK?
- Yes, across England, Scotland, and Wales, with separate provisions for Northern Ireland.
What replaces retentions?
- Retention bonds, performance warranties, and defect guarantees.
What is the penalty for wrongful deduction?
- A fixed statutory sum plus interest and compensation.
Northumberland Development Project Lessons for Your Next Build
The construction retentions ban UK is moving through Parliament now.
Review your contracts before the transition clock starts.
Meta title: How the Construction Retentions Ban UK Changes Cash Flow
Meta description: The construction retentions ban UK ends 5% withholding. See the 60-day cap, 8% interest, and transition timeline. Prepare your contracts now.
