Interim payment invoice template UK (2026): valuations, CIS and VAT
Interim payment invoice UK, short answer: an interim payment invoice bills a periodic interim valuation / interim application under a construction payment cycle (for example a JCT-style valuation date → application → certificate → payment) — not a named contractual stage package, not an open-ended % progress twin alone, not a named milestone gate, not retention release, not snagging, not variation, and not a deposit. Who pays is set by the contract (main contractor, employer, or client). CIS may apply when a CIS contractor pays you for construction operations — soften with HMRC’s CIS overview and your accountant. A private householder paying for work on their own home is usually not CIS and is never treated as the CIS contractor for that home. If you are VAT-registered (threshold £90,000), show VAT correctly on taxable lines; if you are not registered, do not charge VAT.
Use this page when the PDF is an interim valuation / interim application invoice for a payment cycle period. It is not a named stage payment, not the open progress payment twin, not a retention release, not a variation / extras invoice, not a snagging / defects invoice, and not a deposit. Milestone-gate templates are coming soon — do not treat this page as a named-milestone PDF. Figures below are illustrative only. Need the PDF now? Open the free invoice generator (Free: 5 invoices; Pro £7.99 / Pro+ £12.99).
Who pays, CIS and VAT on an interim payment invoice
Start with who certifies or pays the interim application and whether the work sits in construction operations.
Who pays you | Typical interim job | CIS? | VAT if registered |
|---|---|---|---|
Private householder | Periodic bill on a domestic build they pay themselves | Usually no — never treat them as CIS contractor for own home | Often 20% on ordinary domestic works — soften Notice 708; do not invent 0% |
Main contractor / CIS contractor | Interim application against a construction subcontract | May be in CIS base when ops are in scope — soften with HMRC / accountant | Normal VAT, or reverse charge only when eligible contractor tests met — never on a householder |
Employer / client QS | Certified interim valuation under a main contract | Depends whether the payer is a CIS contractor for construction ops | Show net / VAT / gross if registered |
Retention / variation / snag (not this page) | Holdback release, agreed extras, or punch-list remaking | Same CIS tests — use the sister templates | Same VAT rules |
CIS rates (0% / 20% / 30%) sit with the contractor when CIS applies — InvoiceAdept does not decide status and does not file CIS300. VAT threshold is £90,000. InvoiceAdept does not file VAT returns, MTD updates or Self Assessment.
Interim vs stage vs progress vs milestone vs retention vs variation
Use this page when the deal is a periodic interim valuation / application in a payment cycle. Sister pages stay for sister intents.
Billing shape | When it fits | Invoice cue |
|---|---|---|
Interim payment (this page) | Valuation date / interim application / certificate for a period under the contract cycle | Interim no. + valuation date + cumulative to date + this period |
Named stage in an agreed payment schedule package | Stage number + schedule label | |
Open-ended % or valued progress framing on original scope | % complete / progress to date | |
Milestone (coming soon) | Named milestone gate reached | Milestone label — not this interim cycle PDF |
Holdback previously deducted is now due | Retention % / amount, release trigger | |
Agreed change order that changes contract sum | VO / change-order ref | |
Punch-list remaking after practical completion | Snag list ref + item IDs | |
Upfront sum before (or as) work starts | Deposit % or fixed sum |
If the PDF only releases held retention, use retention. If the client agreed extras that grew the contract sum, use variation. Do not invent CIS on a householder interim bill.
What a UK interim payment invoice must include
Field | Always? | Interim notes |
|---|---|---|
Your name or business name | Yes | Match Self Assessment / Companies House |
Your address and contact | Yes | Email helps QS / commercial queries |
Customer name and address | Yes | Ltd = registered name; add site address if different |
Unique sequential invoice number | Yes | e.g. INV-INT-2026-0003 |
Invoice date | Yes | Date of issue |
Tax point / supply date | If VAT-registered and different | Useful when valuation date differs from issue date |
Description of interim work | Yes | Site, interim number, valuation date, period covered, cumulative and this-period amounts; “interim valuation — not stage, retention or variation” |
Contract / application / certificate refs | Strongly recommended | Link application number and any payment certificate |
Payment terms | Yes | Due date per contract payment cycle (or 14 / 30 days if stated) |
VAT number, rates, VAT amount | If VAT-registered | Show net, VAT and gross |
CIS UTR / deduction narrative | When a CIS contractor pays you within scope | Omit on true householder PDFs |
Bank details | Strongly recommended | Sort code and account name matching the invoice |
Never reverse-charge a private householder. Never invent CIS on a domestic own-home interim PDF.
Copy-paste interim payment invoice example (illustrative)
Scenario: sole trader electrician invoices a main contractor for Interim Application 3 on a fit-out subcontract. Valuation date 1 Sep 2026. CIS registered at 20%. Not VAT-registered. Cumulative gross to date (ex retention) £18,400; previously certified £12,100; this period net = £6,300 (illustrative).
Line | Qty | Unit | Net |
|---|---|---|---|
Interim Application 3 — measured works to valuation date 1 Sep 2026 (this period) | 1 | interim | £6,300.00 |
Cumulative certified to date (ex this invoice) | £12,100.00 already billed — not re-billed here | ||
Retention (if deducted under contract) | Show separately or on retention sister when released | ||
Gross subject to CIS (this interim) | £6,300.00 | ||
CIS deduction @ 20% | −£1,260.00 | ||
VAT | Not registered — net only | ||
Amount payable by contractor | £5,040.00 |
Narrate on the PDF: “Interim Application 3 at [site], valuation date 1 Sep 2026. This period £6,300 net. Not a named stage package, retention release or variation. CIS registered 20%. UTR on file.” Keep interim PDFs separate from VO, retention and snagging PDFs so AP can match the payment cycle.
CIS, VAT and reverse charge cues
Topic | Practical rule |
|---|---|
Interim for a CIS contractor on construction ops | May be in CIS base — soften |
Householder own-home interim bills | Usually no CIS; never treat them as CIS contractor |
VAT threshold | £90,000 |
Domestic reverse charge | Never on a householder; contractor tests only |
Deemed contractor | £3 million construction-spend framing — not £1 million |
CIS vs VAT order | CIS on the CIS-liable amount excluding VAT |
InvoiceAdept | Does not file CIS300, VAT, MTD or Self Assessment |
Agreeing the interim before you invoice
Confirm the valuation date, application number, what is included this period, whether retention is deducted under the contract, and whether CIS will apply before you issue the PDF. Match the invoice lines to the application / certificate so AP does not reject the bill.
Shape | How to show it on the PDF |
|---|---|
This-period measured works | “Interim 3 — this period measured works = £X” |
Cumulative to date | Show cumulative and previously certified so the period amount is clear |
Materials on site (if contract allows) | Separate line with contract clause cue |
Retention deducted this period | Show deduction; use retention sister when holdback is released later |
Weak: “Interim as agreed £6,300.” Usable: “Interim Application 3, valuation 1 Sep 2026, this period £6,300 net, CIS 20%, not VAT-registered, not a stage or retention release.”
Payment terms and getting paid
Main-contractor interim bills often follow the contract payment notice / pay-less cycle (commonly framed around 14 or 30 days from the due date in the contract). Householders often prefer 7 days or due on receipt once the period work is agreed. Put bank details on the PDF. Soften B2B late-payment interest with the contract and your accountant.
Common mistakes on interim payment invoices
Mistake | Fix |
|---|---|
Vague “interim as agreed” lump | Name interim number, valuation date, period and amounts |
Calling a named stage package an interim valuation | Use the stage payment sister for schedule stages |
Mixing retention release into the interim PDF | Keep holdback release on the retention sister |
Billing variations as “interim” without a VO | Use the variation sister for agreed extras |
CIS narrative on a householder interim PDF | Remove CIS lines when the householder pays |
Charging VAT when not registered | Net only until registered |
Re-billing the full cumulative as if it were new | Bill this period only; show cumulative for context |
Reverse-charging a householder | Never — reverse charge is contractor-to-contractor when tests met |
Frequently asked questions
Is an interim payment invoice the same as a stage payment invoice?
No. A stage payment bills a named stage in an agreed schedule. An interim payment bills a periodic valuation / application in the contract payment cycle.
How is this different from a progress payment invoice?
Progress pages often frame open % complete. This page is specifically the interim valuation / application cycle (interim number, valuation date, this period vs cumulative).
Is this a milestone invoice?
No. Milestone-gate templates are a sister shape (coming soon). Do not stretch this interim cycle PDF into a named-milestone bill.
Does CIS always apply to interim invoices?
No. CIS may apply when a CIS contractor pays you for construction operations. Private householders on their own home are usually outside CIS — soften with HMRC / your accountant.
Can I put CIS deduction lines on a householder interim invoice?
Usually no. If a private householder pays the interim on their own home, leave CIS narrative off the PDF.
What VAT threshold should I use in 2026?
£90,000. Soften registration with your accountant.
Should retention sit on the same interim PDF?
You can show retention deducted this period for clarity, but when holdback is later released use the retention template.
Where can I build the PDF quickly?
Use the InvoiceAdept free invoice generator — Free covers 5 invoices; Pro is £7.99 and Pro+ £12.99 when you need more.
Next step: build the interim payment invoice
Cite the interim / application number and valuation date, keep householder vs contractor facts straight, show CIS arithmetic only when due (excluding VAT), and show VAT only if registered (£90,000 threshold). Open the free invoice generator, paste the lines from the worked example shape, and send when the period is agreed. InvoiceAdept does not file CIS300, VAT returns, MTD or Self Assessment for you.
Last reviewed: 17 September 2026.
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