Do I Need to Charge VAT Before I Get My VAT Number?
HMRC is still processing your registration but your Effective Date has started. Find out how to invoice correctly, what to collect, and how to avoid hidden VAT exposure during the waiting period.
Last updated 2026-04-28
VAT RESOURCE CENTRE #4
Do I Need to Charge VAT Before I Get My VAT Number?
This is one of the most common VAT registration questions small businesses ask.
You have submitted your VAT registration.
You know or suspect that your Effective Date of Registration has arrived.
But HMRC has still not issued your VAT registration number.
So what now?
Can you wait?
Can you keep invoicing normally?
Do you need to charge VAT already?
Is it even possible to charge VAT without a VAT number?
This situation creates a lot of uncertainty, especially because HMRC processing times are not always fast.
The short answer is this.
Yes, HMRC may still expect VAT to be accounted for from your Effective Date of Registration even if your VAT registration number has not arrived yet.
The practical handling, however, needs to be done carefully.
First, your VAT number delay does not change your Effective Date
This is the first thing to understand.
Many businesses assume that VAT only starts once HMRC sends the official 9 digit VAT registration number.
That is not how the VAT registration rules work.
Your legal VAT obligation begins from your Effective Date of Registration.
This is the date on which HMRC considers your business liable to be VAT registered.
So if your Effective Date has started, the fact that HMRC is still processing the paperwork does not postpone the VAT liability.
This means the business should already be thinking in VAT terms from that point onward.
Does this mean I must start collecting VAT?
In practical terms, yes.
The guide is very clear on this point.
Even where HMRC has not yet responded with the VAT registration number, the business should begin collecting the gross amount from customers from the Effective Date of Registration.
This means charging an amount inclusive of VAT.
For example:
if your normal charge was £100
the gross VAT inclusive amount becomes £120
The business then holds that VAT element ready to be accounted for once HMRC confirms registration.
This is an important distinction.
You are not simply continuing as though nothing changed.
You are collecting on the assumption that VAT is already due.
But can I issue a VAT invoice without a VAT number?
Technically, a formal VAT invoice requires a valid VAT registration number.
So without that number, it is not possible to issue a standard VAT invoice in the normal completed form.
This is where many businesses become confused.
The guide's approach is practical.
You may collect the gross VAT inclusive amount without issuing a full formal VAT invoice yet.
Then, once HMRC issues the VAT registration number, you can provide the completed VAT invoice retrospectively where needed.
This is particularly relevant for business customers who may want the invoice in order to reclaim VAT.
How should I invoice customers while registration is pending?
The invoicing approach depends partly on the customer type, but the guide provides a very workable method.
A business can continue invoicing gross amounts and include a simple note explaining that VAT registration is pending and that a formal VAT invoice can be issued once the VAT registration number is confirmed.
A practical wording might indicate that:
VAT registration is pending and a formal VAT invoice will follow upon confirmation.
This keeps the business commercially moving while preserving the ability to regularise the VAT paperwork later.
Why this matters so much
If a business simply waits for HMRC to reply and keeps charging pre VAT prices with no VAT element included, there is a risk.
HMRC may still expect VAT to be accounted for from the Effective Date of Registration.
That means when the VAT number finally arrives, the business may discover that VAT was already legally due on those sales.
If no VAT was collected from customers during that period, the VAT may have to be funded out of the business's own margin.
This is why the waiting period matters.
HMRC admin delay does not eliminate the underlying VAT exposure.
Example: how this works in practice
Imagine a business whose Effective Date of Registration is 1 March.
HMRC does not issue the VAT registration number until several weeks later.
From 1 March onward, the business should already be collecting VAT inclusive amounts.
So instead of charging £100, it charges £120 gross.
The business does not yet issue a full VAT invoice showing the VAT number because the number has not been received.
Once HMRC confirms registration and provides the 9 digit VAT number, the business can then issue proper VAT invoices retrospectively where required.
This is exactly the practical scenario described in the VAT Threshold Guide.
What if my customers are other VAT registered businesses?
This pending period is often easier with B2B customers.
Why?
Because VAT registered business customers generally need a compliant VAT invoice in order to reclaim VAT, but they are usually familiar with HMRC registration delays.
The business can:
collect the gross amount
explain that registration is pending
issue the completed VAT invoice once the VAT number arrives
This usually creates a manageable temporary bridge.
What if my customers are consumers?
With B2C customers, the issue is less about issuing formal VAT invoices and more about making sure your gross pricing already reflects the VAT due.
Consumers generally do not reclaim VAT.
So the main risk here is not paperwork.
The main risk is failing to collect the VAT inclusive amount and then later having to absorb the VAT yourself.
Common mistakes businesses make during the waiting period
Waiting for HMRC before changing anything
This creates hidden VAT exposure if the Effective Date has already begun.
Continuing to charge old net prices
If VAT is already legally due, the business may later have to fund the VAT from its own receipts.
Issuing incorrect formal VAT invoices without a VAT number
A proper VAT invoice should only be completed once the VAT registration number exists.
Failing to keep track of pending invoices
Businesses should keep a clear record of invoices raised during the registration pending period so they can regularise where needed.
Frequently Asked Questions
Can I legally charge VAT before I receive my VAT number?
You should be collecting VAT inclusive amounts from the Effective Date of Registration if VAT liability has begun, but the formal VAT invoice is regularised once the registration number is issued.
Do I need to stop invoicing until HMRC replies?
No. The guide specifically contemplates continuing to trade and collect gross VAT inclusive amounts while registration is pending.
What if HMRC takes weeks to issue my VAT number?
HMRC delays do not move the Effective Date. The business should still handle sales on a VAT aware basis during that period.
Can I send corrected VAT invoices later?
Yes, especially where business customers require formal VAT invoices for reclaim purposes.
Need help handling the HMRC waiting period?
The period between your Effective Date of Registration and HMRC's VAT number confirmation can be confusing if you do not know exactly how to invoice, what to collect and what records to keep.
VATthreshold gives you practical VAT tools, the full VAT Threshold Guide and direct access to former HMRC officers when you need a clear answer on what to do next.
Use the calculators, work through the guide, or ask an expert if your registration is already in motion.