Retentions in UK construction (2026): how they work, HGCRA rights and release
Retentions in UK construction (2026): how they work, HGCRA rights and release
By InvoiceAdept Team7 September 2026Updated 7 September 202614 min read
By InvoiceAdept Editorial · 7 September 2026 · Local preview wrap - not live CMS
Last reviewed: 7 September 2026 Author: InvoiceAdept Editorial Sources checked: GOV.UK Construction Act payment, GOV.UK payment notices and pay less notices, GOV.UK adjudication, GOV.UK late commercial payments, Bank of England Bank Rate, GOV.UK invoicing.
Retention is money you have already earned that a contractor or client holds back for a contractual period - usually until practical completion and then until the end of the defects liability (rectification) period. It is not a deposit. It is not a variation. It is not automatic statutory protection sitting in a government bank account.
This page rewrites a thin, generic live URL into a practical UK money guide for trades and subcontractors. It removes fluffy "industry insight" prose and does not invent national averages, case studies or a mandatory retention deposit scheme. Where percentages appear (for example "typically around 3-5%"), treat them as illustrative / common contractual patterns, not surveyed UK averages.
Sister pages:
Calculate retention payments construction UK - arithmetic and invoice lines for retention release
Retention invoice template UK - field pattern for the release invoice
Deposit invoice template UK - deposits are the opposite cash direction
InvoiceAdept helps you raise applications and invoices, show retention withheld and due, and send reminders. Free is five invoices per month. Pro is £7.99 excl VAT. Pro+ is £12.99 excl VAT (CIS). Stripe's own fees apply; InvoiceAdept adds no platform fee. InvoiceAdept does not hold retention in escrow, file adjudication, file CIS300, VAT returns, Making Tax Digital updates, Self Assessment or court claims.
General information only - not legal or tax advice. Confirm your contract, the Housing Grants, Construction and Regeneration Act 1996 (HGCRA) as amended, and current GOV.UK guidance before you suspend work or start adjudication.
Quick answer
Question | Short answer |
|---|---|
What is retention? | A contractual hold-back of money already earned, usually a percentage of the certified value |
Typical %? | Often discussed as around 3-5% - illustrative / contractual, not a statutory rate |
When is it released? | Common pattern: half at practical completion (PC), half at end of defects liability period (DLP) - if the contract says so |
Is release automatic by law? | No. Timing and amount are contractual (subject to HGCRA payment machinery where the Act applies) |
Is there a mandatory retention deposit scheme in 2026? | No. Discussions and proposals continue; do not invent a live statutory scheme |
Can I claim Late Payment Act interest? | On eligible B2B debts when retention (or the released sum) is overdue - Bank Rate + 8% (recently 3.75% -> 11.75%). Not automatic for consumers |
What does InvoiceAdept do? | Invoice and remind. It does not hold escrow or run adjudication |
What retention is (and what it is not)
Retention is a slice of the contract sum (or of each application) that the paying party withholds as security for incomplete work and defects. You have usually performed the work that generated that value; the cash is simply not paid yet.
Concept | Direction of money | Timing | Typical purpose |
|---|---|---|---|
Deposit | Client -> you (advance) | Before / early in the job | Materials cash, commitment |
Stage / interim payment | Client -> you | During the job | Pay for work done to date |
Retention | Held back from sums otherwise due | During / after PC into DLP | Security for defects / incomplete items |
Retention release invoice | Client -> you | At contractual release dates | Pay the held-back earned money |
Do not label a deposit "retention". Do not label snagging labour a "retention invoice" unless you are actually releasing held money. For deposit paperwork see the deposit invoice template. For the release arithmetic see calculate retention payments.
Typical percentages - say "typically", not "the industry average"
Construction contracts often use retention in the region of 3% to 5% of the contract sum or of interim valuations. Some contracts use other figures; some use zero; some use a capped cash retention. This guide does not invent a national average, a "62% of SMEs" survey, or a "£22bn stuck in retentions" headline. Read your contract: the percentage, the release dates, and any cap or bond alternative are what bind you.
Practical completion versus defects liability
Two milestones drive most retention releases:
Milestone | What it usually means | Retention effect (common pattern) |
|---|---|---|
Practical completion (PC) | Works are complete enough for beneficial use, subject to snags | Often half of retention released |
End of defects liability / rectification period (DLP) | Period after PC for making good defects notified under the contract | Often remaining half released after defects made good |
Exact definitions of PC and DLP sit in the contract (JCT, NEC, bespoke, or a short-form trade agreement). Practical completion is not the same as making good every paint chip. Defects liability is not an open invitation to redesign the job for free. If the contract is silent or unclear, do not invent release dates - get the wording clarified in writing before you rely on a half-and-half assumption.
Snagging is not free redesign
Snag lists at PC should capture incomplete or defective work under the original scope. New wish-list items after PC are variations or new instructions - price them, do not bury them inside "retention release conditions". Sister guide: variation orders.
Half at PC / half at end of DLP - contractual, not statute
A very common UK pattern is:
1. Deduct retention (e.g. 5%) from interim applications. 2. Release half of the accumulated retention at practical completion (so 2.5% of the relevant value remains held, if 5% was the rate). 3. Release the balance at the end of the defects liability period once notified defects are made good.
That pattern is contractual practice, not a rule written into the Late Payment Act or a mandatory government timetable. Your contract might:
release all retention at PC
hold a fixed sum rather than a percentage
substitute a retention bond
use NEC-style mechanisms with different labels
Always invoice (or apply) for release when the contractual trigger is met. Waiting "until they remember" is how retention ages into a bad debt conversation.
Many UK tradespeople also find it helpful to review How to chase late invoice payments UK at this stage.
How to show retention on invoices and applications
Clarity beats folklore. Every interim application or invoice that suffers retention should show the arithmetic.
Line | Example (illustrative) |
|---|---|
Gross value of work this period | £10,000 |
Less retention 5% | -£500 |
Net before VAT / CIS as applicable | £9,500 |
Cumulative retention held to date | £2,400 (running total) |
Retention released this certificate (if any) | £0 |
At PC release (illustrative):
Line | Example (illustrative) |
|---|---|
Cumulative retention held | £2,400 |
Half release at PC (contract clause X) | £1,200 due |
Retention remaining until end of DLP | £1,200 |
At final release:
Line | Example (illustrative) |
|---|---|
Retention remaining | £1,200 |
Defects notified and made good (list / reference) | Per snag close-out |
Final retention release due | £1,200 |
Use a new invoice number for retention release - do not silently edit an old interim PDF. Cross-check CIS and VAT treatment with your adviser: retention release is still payment for construction operations already valued; CIS may still apply when a contractor pays a subcontractor under the scheme. InvoiceAdept Pro+ can show CIS-style lines; it does not file the contractor's CIS300.
Tracking checklist
Contract retention % and any cap written down
Each application: gross, retention deducted, cumulative held
PC date and certificate / email evidence
Half-release invoice sent with clause reference
DLP end date in your calendar (not only the main contractor's)
Defects notices logged with dates and close-out evidence
Final release invoice sent promptly when due
Reminder sequence if unpaid - see payment reminders that work
HGCRA 1996: payment notices, pay less notices, suspension, adjudication
Where the Housing Grants, Construction and Regeneration Act 1996 (as amended) applies to your construction contract, it provides a payment framework. High-level points only - read GOV.UK Construction Act payment rules and take advice on your facts.
Payment notices and pay less notices
In outline, the Act's payment machinery expects:
a due date and a final date for payment under the contract (or implied Scheme terms where relevant)
a payment notice stating the sum due
if the payer wants to pay less, a pay less notice in time, stating the sum considered due and the basis
If notices are late or missing, the Act's consequences can favour the payee - but this is technical. Do not invent a notice on a blog template and assume you have won. Keep applications clear, dated and referenced to the contract payment cycle.
Document | Who usually issues | Why it matters |
|---|---|---|
Payment application / invoice | You (payee) | Starts the valuation conversation with clear retention maths |
Payment notice | Payer (or as contract provides) | States the notified sum |
Pay less notice | Payer | Explains a reduction; must be in time and reasoned |
Retention release application | You | Triggers the release sum into the payment cycle |
Suspension
In qualifying contracts, unpaid notified sums can support a right to suspend performance after giving the required notice. Suspension is a serious step: it affects programme, relationships and sometimes safety-critical works. Follow the statutory and contractual notice periods exactly. InvoiceAdept does not serve suspension notices for you.
Adjudication
Construction adjudication is a rapid dispute process available for many construction contracts under the Act. See GOV.UK construction adjudication. Typical uses include disputed valuations, withheld sums and retention release fights. Adjudication has strict timelines and costs. InvoiceAdept does not file or run adjudications. If retention is wrongly withheld after the contractual trigger, speak to a construction solicitor or adjudicator nominating body - do not rely on reminder emails alone for large sums.
No mandatory retention deposit scheme as of 2026
For years, industry bodies and policymakers have discussed requiring retention monies to be held in a deposit account, trust or similar ring-fence so that subcontractors are protected if the payer becomes insolvent. As of this review (7 September 2026), there is no UK-wide mandatory retention deposit scheme in force that this guide can cite as live law. Discussions continue; proposals are proposals. Do not tell customers or subcontractors that "the law now puts all retention in a government escrow" unless and until primary or secondary legislation actually does that - and then cite the instrument.
Practical consequence today: retention you are owed is usually an unsecured contractual debt sitting on someone else's balance sheet. That is why release discipline and payer creditworthiness matter.
Insolvency risk; escrow and trust proposals only
If the paying contractor enters insolvency while holding your retention, you may be an unsecured creditor for that sum. Project bank accounts, trusts and escrow arrangements appear in some contracts and in policy proposals - treat them as contract-specific or proposal-stage, not as a universal safety net.
Risk control | What it does | What it is not |
|---|---|---|
Lower retention % or early release clauses | Reduces cash stuck | Not always acceptable to the payer |
Retention bond | May replace cash retention | Has cost and qualification hurdles |
Project bank account / trust (if contracted) | Can ring-fence some payments | Only if actually set up in that contract |
Credit checks / payment history | Avoids serial late payers | Not a legal shield after the fact |
Prompt release invoicing | Stops retention ageing quietly | Does not defeat insolvency preference rules |
InvoiceAdept does not operate a retention escrow or trust account for your clients' money.
Worked illustrations (labelled illustrative only)
Figures below are illustrative arithmetic to show invoice structure - not market rates, not advice on what your contract should say.
Illustration 1 - 5% retention, half at PC
Step | Illustrative figure |
|---|---|
Contract sum | £40,000 |
Retention rate | 5% |
Max retention if fully deducted | £2,000 |
Released at PC (half) | £1,000 |
Held through DLP | £1,000 |
Released at end of DLP | £1,000 |
Illustration 2 - Interim application showing deduction
Line | Illustrative £ |
|---|---|
Value this month | £8,000 |
Retention 5% | £400 |
Payable before VAT/CIS | £7,600 |
Illustration 3 - Retention release invoice lines
Line | Illustrative £ |
|---|---|
Retention release - PC half - contract clause 4.2 - project Ref ABC | £1,000 |
VAT if applicable | Per your VAT position |
CIS if contractor-paid construction ops | Split labour/materials as applicable; retention release is still within the payment story |
If you are sorting this alongside other compliance work, read Handling deposit payments tradesperson UK.
Late Payment Act interest on overdue retention (B2B only)
When a retention release sum is contractually due and unpaid, and the debt is an eligible business-to-business commercial debt, the Late Payment of Commercial Debts (Interest) Act 1998 can support:
statutory interest at Bank Rate + 8%
fixed compensation bands (£40 / £70 / £100 per late invoice depending on size)
Checked for this guide: Bank Rate recently 3.75%, so the statutory annual rate is 11.75% while Bank Rate remains 3.75%. Confirm the Bank of England Bank Rate and the six-month reference-date rule on GOV.UK before you claim. See also late payment rights UK tradespeople and how to calculate late payment interest UK.
This statutory interest route is not automatic for consumers / householders. Domestic customers need clear contract terms. Retention is more common on contractor-led projects than on small householder jobs; when you do agree retention with a consumer, write the release rules into the contract.
Common mistakes
Mistake | Why it hurts | Better approach |
|---|---|---|
Treating retention as a deposit | Wrong tax-point and cash story | Separate documents and definitions |
Assuming half/half without reading the contract | Wrong release date | Quote the clause on the release invoice |
Never sending a retention release invoice | Cash stays unclaimed | Calendar DLP end; invoice promptly |
Inventing a mandatory deposit scheme | Misleads clients and staff | State clearly: no UK-wide mandatory scheme as of 2026 |
Fake stats ("£22bn", "62% of firms") | Damages trust and SEO quality | Stick to contract maths and GOV.UK |
Ignoring HGCRA notices | Weakens payment position | Follow Act / Scheme notice rules |
Using Late Payment Act language on a householder | Wrong legal route | Contract terms + reminders for consumers |
Expecting InvoiceAdept to hold escrow | Product cannot do that | Invoice and remind only |
How InvoiceAdept fits retention workflows
Need | InvoiceAdept | Not InvoiceAdept |
|---|---|---|
Show retention deducted on stage invoices | Yes - clear line items | Deciding the legal % for you |
Raise retention release invoices | Yes - new numbered invoices | Holding the cash in trust |
Reminders when release is late | Yes - reminder sequences | Serving HGCRA suspension notices |
CIS line patterns on Pro+ | Yes | Filing CIS300 |
Card collection of released sums | Stripe fees apply; no platform fee | Adjudication filing |
Digital records | Helps MTD-style record keeping | Filing VAT returns / MTD submissions |
Pricing: Free - five invoices/month. Pro - £7.99 excl VAT. Pro+ - £12.99 excl VAT with CIS. Operator: Tech Me Today Ltd, Companies House 15917255, ICO ZB944663.
Householder jobs versus main-contractor retentions
Retention is far more common when you are paid by a main contractor, developer or housing association than when you invoice a private householder for a short domestic job. Many householder contracts use deposits and stage payments instead of retention. If a householder still wants a hold-back:
Write the percentage, release triggers and snag process into the signed terms before work starts.
Do not rely on Late Payment Act statutory interest as your primary consumer remedy - that Act is for eligible B2B debts.
Keep the hold-back small and time-limited; long open-ended "we'll pay when we're happy" clauses are how disputes start.
Raise a clear retention release invoice when the agreed trigger hits, with photos of snag close-out attached if helpful.
On contractor-led projects, assume retention will appear unless the enquiry pack says otherwise. Price your cashflow on the net you will actually receive each month, not only on the headline package total.
Related: see How to handle deposit payments tradesperson UK for practical next steps.
CIS, VAT and retention release (high level)
Retention release is still a payment for construction work already done. When a CIS contractor pays you, the release sum can sit inside the same CIS story as earlier applications - labour versus materials rules still matter if materials were part of the original valuation basis. Soften absolute claims: confirm with your accountant how each certificate treats materials already paid and retention still held.
VAT: if you are VAT-registered and the underlying supplies were standard-rated, retention release usually follows the same VAT analysis as the original work (including domestic reverse charge where those tests were met). Do not invent a special "retention is VAT-free" rule. Tax point timing can be technical when sums were certified earlier - get advice on large releases.
InvoiceAdept does not decide CIS or VAT treatment and does not file CIS300 or VAT returns.
Email and application wording you can adapt
Use plain wording. Adapt; do not treat as legal notices under the HGCRA.
Interim application note (illustrative): "Application APP-014 - week ending 5 September 2026 - gross value £8,000 - less retention 5% (£400) per contract clause 4.1 - net £7,600 before VAT/CIS as applicable. Cumulative retention held after this application: £2,400."
PC half-release request (illustrative): "Invoice RET-003 - release of half retention on Project Ref ABC following practical completion dated 1 September 2026 - £1,200 due per clause 4.2. Remaining retention £1,200 held until end of defects liability period."
Final release request (illustrative): "Invoice RET-004 - final retention release £1,200 - defects liability period ended 1 March 2027 - notified defects under notices D1-D3 made good (photos attached). Please pay by [due date]."
These are commercial invoice texts, not payment notices or pay less notices under the Act. If you need statutory notices, follow GOV.UK and your contract - or instruct a solicitor.
FAQ
What is retention in UK construction?
A contractual hold-back of money you have earned, kept by the payer as security for incomplete work and defects, usually until practical completion and the end of the defects liability period.
Is 5% retention a legal requirement?
No. Percentages such as 3-5% are common contractual choices, not a statutory fixed rate. Your contract governs.
When should half the retention be released?
Only when your contract says so. A common pattern is half at practical completion and half at the end of the defects liability period - but that is practice, not an automatic statute.
Is there a mandatory retention deposit scheme in 2026?
No UK-wide mandatory retention deposit scheme is in force as of this review (7 September 2026). Policy discussions continue; do not invent a live law.
Does the HGCRA force retention release on a fixed date?
The Act provides payment notice, pay less notice, suspension and adjudication machinery for qualifying construction contracts. Retention amounts and release triggers still come from the contract. See GOV.UK Construction Act payment rules.
Can I adjudicate over unpaid retention?
Often yes for qualifying construction contracts - adjudication is designed for rapid dispute resolution. It has costs and strict timelines. Get advice. InvoiceAdept does not run adjudications. See GOV.UK construction adjudication.
Can I claim statutory interest on late retention release?
On eligible B2B debts, yes - Bank Rate + 8% (recently 3.75% -> 11.75%), plus fixed compensation bands where applicable. Not automatic for consumers. Confirm on GOV.UK.
How do I show retention on an invoice?
Show gross value, retention deducted, net payable, and a running cumulative held. On release, raise a separate invoice for the release sum with the contract clause and milestone (PC or end of DLP).
Is retention the same as a deposit?
No. A deposit is money paid to you early. Retention is money earned but held back. Different documents, different timing.
What happens to retention if the main contractor becomes insolvent?
You may be an unsecured creditor for unpaid retention unless a contractual trust, project bank account or similar actually ring-fences the funds. Escrow/trust proposals are not a universal safety net.
Does InvoiceAdept hold retention in escrow?
No. InvoiceAdept issues invoices and reminders. It does not hold client retention money or file adjudication.
Where is the calculator / sister arithmetic page?
Use calculate retention payments construction UK for worked release maths and retention invoice template UK for field layout.
Worth pairing this with our guide to Handle deposit payments tradesperson UK.
Related guides
About this guide
Last reviewed 7 September 2026. Written for UK trades and subcontractors who need retention shown clearly on applications and released on time. It cites GOV.UK Construction Act payment guidance, adjudication guidance, late commercial payments pages and the Bank of England Bank Rate. It does not invent mandatory deposit-scheme law, national retention statistics or fake case studies.
General information only - not legal or tax advice. Confirm HGCRA application, notice periods and insolvency questions with a construction solicitor where sums are material. InvoiceAdept is operated by Tech Me Today Ltd (Companies House 15917255, ICO ZB944663).
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