Waiting for Your VAT Number? What to Do About Invoices, VAT Charges and HMRC Delays

BRITVEX ADVISORY LTD · UK VAT TROUBLESHOOTING · Editorial review: 11 November 2026

Quick answer: If you have applied for UK VAT registration but have not yet received your VAT number, you must account for VAT from the effective date of registration (EDR) if the registration takes effect, but you must not issue an invoice that separately shows VAT before HMRC gives you the number. HMRC permits an interim invoice at an appropriately adjusted total price, provided the commercial arrangement allows it. Once the VAT registration number arrives, issue the proper VAT invoice, linking it to the original transaction. Keep full transaction records while HMRC processes the application and follow up through the official route if the delay exceeds the published guidance.

That distinction matters more than the number of days since the application was submitted. A business can lose margin by failing to plan for VAT from its EDR, yet mislead customers by describing itself as VAT-registered before approval. The safest response is to confirm the registration date, check the application status, adopt an interim invoicing method and keep a tax reserve.

This guide is for UK sole traders, limited companies and other businesses that have already applied or need to reconcile a delayed VAT registration. For general eligibility, VAT schemes and routine returns, see Britvex’s VAT registration and returns service. If you need a review of pending invoices, use Get a Quote or our secure portal enquiry. No tax adviser can guarantee HMRC approval or a particular processing date.

VAT number pending: six decisions to make immediately

1. Confirm the application exists. Save the submission acknowledgment, reference, applicant details, supporting documents and any HMRC requests. Do not assume a draft form was submitted.
2. Confirm the likely effective registration date. This determines which supplies may have VAT consequences; it is not necessarily the date the certificate lands in your inbox.
3. Decide how to price new sales. Check whether quotations and contracts allow a VAT-related increase. Do not promise business customers a reclaim based on a document that is not yet a valid VAT invoice.
4. Use compliant interim invoices. Do not show a separate amount labelled VAT or invent a registration number while waiting.
5. Maintain VAT-ready records. Capture invoice dates, tax points, cash receipts, purchase invoices, credit notes and amounts by VAT treatment.
6. Plan the correction and first return. Once registered, send the proper VAT invoice and reconcile the opening VAT liability and eligible input VAT.

If your business is trading across borders, importing goods or supplying exempt/zero-rated services, the appropriate treatment may differ. A pending registration does not turn every receipt into a standard-rated sale.

The legal distinction: effective registration date versus receiving the number

What is the effective date of registration?

The EDR is the date from which a business becomes VAT-registered for the relevant supplies. It can arise because a compulsory registration threshold has been exceeded, because of a prospective 30-day test or because HMRC accepts a voluntary registration date. HMRC’s decision and the underlying facts determine the actual EDR. The date on a VAT certificate can therefore be earlier than the day on which you receive it.

The current UK compulsory threshold is more than £90,000 of taxable turnover in a rolling 12-month period, subject to the detailed rules. Exempt turnover is treated differently and overseas-established businesses can have separate registration obligations. The threshold is not a calendar-year or accounting-year total. Read HMRC’s VAT thresholds if you are still checking whether the original application was required.

Can you charge VAT before you get the registration number?

HMRC’s registration guidance makes two points that must be read together. You cannot include VAT as a separate item on invoices until the number is issued. However, you can increase the overall price charged to reflect VAT that you expect to account for from the EDR. Once the VAT number arrives, reissue the paperwork showing the correct VAT breakdown.

The phrase “I am waiting for my number, so VAT is not payable yet” can be wrong. Equally, “I can issue a VAT invoice without the number because my application is pending” is wrong. You need to separate the VAT accounting obligation, the legal invoice requirements and the contract with the customer.

Who decides the final date?

HMRC determines the approved EDR. Maintain a provisional working assessment using the threshold calculation and application evidence, but avoid presenting a provisional date as confirmed. If HMRC issues a certificate with an unexpected date, reconcile all taxable sales and purchases from the confirmed date and assess whether HMRC must be contacted about an error.

How to invoice customers while VAT registration is pending

Step 1: do not create a false VAT invoice

Issue your normal commercial document without an invented VAT registration number or a separately identified VAT amount. The document must not imply that HMRC has approved the registration when it has not. Keep the description, supply date, invoice reference, agreed price and customer details accurate. It may be appropriate to explain in plain commercial wording that VAT registration is pending and that a replacement VAT invoice will follow if the effective date covers the supply.

Step 2: check whether you can increase the gross selling price

A quotation stating “£1,000 plus VAT if applicable” may operate differently from a fixed “£1,000 inclusive of all taxes” price. The contract, customer communications, consumer-protection rules and tax point all matter. Do not unilaterally add 20% where the customer has no contractual obligation to pay it. Ask the customer to agree a revised amount where necessary.

Step 3: preserve the original transaction trail

Retain the interim invoice and payment record rather than deleting them. When the certificate arrives, issue the proper VAT invoice with the required number and VAT breakdown, linking it clearly to the original amount so the customer is not charged twice. HMRC VAT Notice 700/1 says that, once the number is received, the necessary VAT invoices should be sent within 30 days.

Step 4: keep B2B and consumer communications different

A VAT-registered business customer may need a valid VAT invoice before it can reclaim input VAT. A consumer normally cannot reclaim VAT, and the final amount the consumer agreed to pay may be commercially fixed. Businesses selling to both groups should review the sales channels separately rather than adopting one blanket rule.

Worked example: a £1,000 sale during the waiting period

A consultancy applies to register and later learns its EDR is 1 September. On 12 September it supplies a standard-rated service worth £1,000 before VAT, on terms allowing VAT to be added. The customer is a VAT-registered business.

This is an illustration of a standard-rated, 20% UK supply. It is not a template for zero-rated supplies, reverse charges, exempt services or overseas place-of-supply transactions. If the agreed price was instead a fixed £1,000 inclusive of VAT, the calculation could be £833.33 net plus £166.67 VAT at 20%, reducing the business’s retained revenue. The difference illustrates why contracts and pricing must be reviewed before invoicing.

A note about VAT fractions

Where a price is genuinely VAT-inclusive at 20%, the VAT element is one-sixth of the gross. It is not 20% of the gross. The net sale is five-sixths. For £1,000 VAT-inclusive, one-sixth is £166.67; twenty percent of £1,000 (£200) would overstate the VAT component. The correct calculation still depends on the supply actually being standard-rated.

Will customers accept invoices without a VAT number?

Some customers, especially large businesses, procure-to-pay systems and public-sector organizations, may reject the document as a VAT invoice or hold back input-tax recovery. They may nevertheless accept it as an interim commercial request for payment under their contract. Explain that it is not a valid VAT invoice and confirm that a corrected invoice will be supplied once HMRC provides the registration number, if applicable. Do not guarantee their ability to reclaim VAT; that depends on their own circumstances and valid evidence.

Where purchase-order rules require a VAT number, ask the customer which interim documentation their process permits. Never insert another company’s number or an unallocated number simply to pass a vendor portal check.

What happens to VAT you should have charged but did not?

If the EDR covers the sale, the business may still have to account to HMRC for VAT even if the customer paid only the original price. That can mean funding VAT from the gross consideration unless the contract permits an additional amount to be collected. A failure to price correctly can become a cash-flow cost, not just a paperwork inconvenience.

Keep a reconciliation of supplies from the potential EDR, showing gross proceeds, VAT rate, expected output tax, refunds and credit notes. Once registration is confirmed, recalculate on the actual taxable supplies. Do not assume all pre-registration invoices must be reissued: the relevant ones depend on the EDR, tax-point rules and VAT liability.

VAT registration taking too long: when and how to contact HMRC

Start with the confirmation and outstanding-information requests

Check the email and address stated in the application, including spam folders and any agent correspondence. HMRC may need additional information or evidence about business activity, turnover, identity or the intended taxable supplies. Respond to genuine requests using official channels and retain copies. A silence caused by an unanswered request is not the same as an unexplained delay.

The published 40-working-day follow-up guidance

HMRC’s VAT Notice 700/1 advises that, if you have heard nothing after 40 working days, you should contact the VAT Registration Service to ensure the application was received. It also says not to contact earlier just to chase progress, as that may slow processing. This is follow-up guidance, not a promise that every application is approved within 40 working days. Applications requiring additional information may take longer.

What to include in a useful follow-up

Prepare the business legal name, application reference, date of submission, applicant type, current correspondence address and the question you need answered. Be ready to explain whether HMRC requested further documents and when you provided them. You should not post sensitive VAT application details on public forums or send identity documents to unverified contacts. Use HMRC’s official VAT contact information.

VAT application problems: symptom, possible cause and next step

These are diagnostic possibilities, not claims that HMRC uses these exact error labels in its systems.

Can you reclaim VAT on purchases while waiting?

An eventual registered business may be able to reclaim eligible input VAT on qualifying purchases, subject to normal input-tax rules and supporting VAT invoices. Keep the records even while HMRC processes the application. The right to recover VAT depends on the business’s taxable activity, the effective date, use of goods/services, partial-exemption position and other rules—not simply proof that an application was submitted.

Goods bought before registration

HMRC’s pre-registration rules generally consider qualifying goods still on hand and acquired within the prior four years, subject to the conditions, including use in the business’s taxable activity. The four-year window is not blanket permission to reclaim VAT on every historic purchase or goods already consumed.

Services bought before registration

The commonly applicable pre-registration input VAT window for services is six months before the EDR, subject to the other conditions. Services wholly related to non-business or exempt activity may not qualify. See HMRC’s input tax time-limit manual for the rules and distinctions.

Costs after the effective date

For qualifying taxable activity, VAT on eligible purchases from the EDR can generally be considered for recovery even if the certificate is delivered later, provided the required documentation is held. Do not confuse the date the invoice was received with the date of the supply or the EDR. A professional review is particularly worthwhile for property, mixed taxable/exempt activity and large startup costs.

Your first VAT return after a delayed registration

Once approved, check the certificate for the exact EDR and VAT number. Set up the VAT registration in compatible accounting software, verify the first VAT accounting period and collect every relevant transaction. Under Making Tax Digital for VAT, VAT-registered businesses generally must keep the required digital records and file using compatible software unless an exemption applies.

A reliable first-return process includes (1) sales reconciliation from the EDR, (2) correct tax codes and tax points, (3) reissued VAT invoices, (4) credit notes, (5) eligible input tax, (6) review of imports and reverse charges, (7) bank/payments reconciliation, and (8) review of the actual VAT return deadline. The first return may cover an unusual period, so do not assume it is precisely three months.

For ongoing records, see Britvex bookkeeping and records and VAT registration and returns.

Special situations that need closer review

A sole trader crosses the threshold during an active contract

Check when registration becomes compulsory, the contract’s VAT clause and whether the customer is a business or consumer. A long-term fixed-price contract may expose the trader to output VAT that cannot be recovered from customers. Do not retrospectively create a tax clause that did not exist.

A newly incorporated company registers voluntarily

The business may choose a voluntary EDR that HMRC accepts. Purchases before the EDR require the pre-registration rules, while supplies from the EDR can generate output tax. A director’s personal purchases are not automatically the company’s input tax; ownership and invoicing evidence matter.

An ecommerce seller uses marketplaces

Sales channels, marketplaces, imported inventory, overseas sellers and place-of-supply rules may create registration and VAT obligations unrelated to the ordinary threshold. Seek transaction-specific advice rather than using the standard UK domestic-service illustration for every marketplace sale.

A business sells exempt, zero-rated and standard-rated items

A pending VAT registration does not make exempt supplies taxable. Zero-rated sales are taxable supplies with a zero rate; exempt supplies are different for registration and input-tax recovery. Correct coding is critical when the business has mixed activities.

Customers demand proof through the online VAT checker

HMRC’s VAT number checker validates existing numbers. It cannot be used to find a business’s number by name or prove a pending application. Share the official approval/certificate after it arrives instead of pretending the number checker can verify an application in progress.

A cash-flow reserve while HMRC decides

Suppose a business expects £18,000 of standard-rated net sales over the pending period and its contracts allow 20% VAT to be added. The potential output VAT is £3,600. That £3,600 is not automatically available for dividends or operating expenses. Eligible input VAT may reduce the ultimate liability, but it needs to be evidenced and calculated. If the contracts fix the gross amount at £18,000 inclusive, the VAT element at 20% is £3,000, leaving £15,000 net. This difference is a useful stress test for cash forecasts.

Do not treat either figure as a prediction of HMRC’s decision or a tax bill where supplies fall outside the standard-rated example. Build a schedule using the business’s real tax treatment and confirmed EDR once available.

Documents Britvex needs to review your case

• Application reference, submission date, type of registration and any HMRC messages.
• A reasoned assessment of the effective registration date and rolling turnover calculation, if relevant.
• Sample contracts and quotations showing whether prices are VAT-inclusive or VAT-exclusive.
• An invoice list from the proposed EDR, with customer types, tax treatment and receipts.
• Purchase invoices, credit notes, bank statements and software export/reconciliation.
• Any customer correspondence about provisional invoices or VAT invoice requests.
• A list of cross-border supplies, exempt activities or special VAT schemes.

Share documents through the Britvex client portal or support, rather than putting personal identifiers and passwords in an ordinary email.

How Britvex can help without promising an HMRC outcome

Britvex can check whether the registration application and proposed EDR are consistent with the facts, review interim invoice wording and contracts, prepare an opening VAT reconciliation, assess eligible input tax and organize first-return records. We can also assist with HMRC correspondence where appropriately engaged and authorized. Approval and processing times remain decisions for HMRC.

Need a review of pending VAT registration and invoices? Get a VAT quote on Britvex.com or select VAT on the Britvex portal quote form. Existing clients can sign in or raise a support request. You can also contact us on +44 20 3758 7500 or info@britvex.co.uk.

Frequently asked questions

Can I issue a VAT invoice before I receive my VAT number?

No. HMRC says you must not show VAT separately on invoices until it gives you a registration number. You may issue suitable interim commercial documentation, and you may adjust the overall price where the contract allows, then provide the proper VAT invoice after registration.

Does a delay mean I do not owe VAT yet?

Not necessarily. Where registration takes effect from an earlier EDR, VAT can be due on taxable supplies from that date. Confirm the EDR and tax treatment before assuming no liability arose.

Should I write “VAT pending” on an invoice?

You may use a clear factual explanation that an application is pending, but it must not represent the document as a valid VAT invoice or separately state VAT that you are not yet permitted to show. Ensure the wording and total price align with the contract.

Can I add 20% to an agreed price?

Only where the contractual and legal position allows it and the supply is standard-rated. A fixed consumer price may be VAT-inclusive, leaving the business to account for the VAT from its gross receipts.

What if my customer needs a VAT invoice for input-tax recovery?

Explain that a proper VAT invoice can be provided once HMRC issues your number and the supply is within the registration period. Do not suggest the customer can reclaim VAT using an invalid or invented VAT number.

How long should I wait before chasing the VAT registration application?

HMRC’s VAT Notice 700/1 advises checking with the VAT Registration Service if nothing has been heard after 40 working days; applications with outstanding information may take longer. This is guidance about following up, not a universal approval guarantee.

Will HMRC backdate my VAT registration?

HMRC may confirm an EDR earlier than the issue date of the number, depending on the registration facts. Compulsory registration may apply from the date required under law even when the application was made late. Check the certificate and seek correction if the registered date appears wrong.

Can I recover VAT on purchases made before registration?

Potentially, subject to conditions. The familiar limits are generally four years for qualifying goods on hand and six months for eligible services before the EDR. Recovery also depends on evidence, business use and any exemption restrictions.

Do I need Making Tax Digital software before my VAT number arrives?

Plan your records and software early, but you will need the correct VAT account and registration details to set up the relevant MTD VAT reporting connection. Confirm the approved period and first-return deadline when registered.

Is the HMRC VAT checker proof that my application was received?

No. The VAT number checker is for checking an issued number, not looking up a pending application or searching by company name. Keep your application reference and follow up using official HMRC channels.

What if HMRC refuses my registration?

Read HMRC’s reasons and check whether the application has the right facts, evidence and taxable activity. Depending on the decision, there may be scope to correct the application or use an available review or appeal route. Do not continue describing the business as registered unless it is.

Can Britvex issue the VAT number or accelerate HMRC approval?

No. HMRC issues the VAT registration number and determines approval. Britvex can help with the application, transaction records, communications and first return within an agreed engagement, but cannot guarantee a particular date.

Official sources and further reading

• HMRC: Register for VAT — How to register, including invoices while waiting
• HMRC: VAT Notice 700/1 — Registration, invoice rules and 40-working-day follow-up
• HMRC: VAT registration thresholds
• HMRC: VAT invoices and record keeping (Notice 700/21)
• HMRC: Pre-registration input tax timing
• HMRC: VAT general enquiries

Britvex publishes general UK tax information, not individualized tax or legal advice. VAT treatment depends on the supply, registration facts, contracts and HMRC’s actual decision. Britvex is an HMRC AML-supervised UK accountancy and advisory practice and an approved Companies House ACSP; ACSP status is distinct from HMRC VAT registration authority.