Not all goods and services carry a 20% VAT, knowing the right rate can save costly mistakes.

When a VAT-registered business issues an invoice to their customer, they must ensure that they charge the correct rate of VAT. Whilst most businesses in the UK charge VAT at the standard rate of 20% there are a number of different VAT rates and exemptions to be aware of. This includes the reduced VAT rate of 5% and the zero rate (0%).

There are two other categories that the supplies of goods and services can fall under:

• Exempt – where no VAT is charged on the supply. Examples of exempt items include the provision of insurance, postage stamps and health services provided by doctors. If a business only sells VAT-exempt goods and services, they cannot register for VAT.
• Supplies that are 'outside the scope' of the UK VAT system altogether. These supplies are beyond the realm of the UK VAT system, and you cannot charge or reclaim VAT on these supplies. Examples include goods or services you buy and use outside of the UK, statutory fees (such as the London Congestion Charge) and goods you sell as part of a hobby.

If a business has made an error in charging VAT, then this needs to be corrected. The timing and amount of an error can impact on how the issue is resolved.

There are also penalties if you charge VAT to your customers before you are officially VAT registered. VAT registration is only required for eligible businesses earning more than £90,000 per year although businesses under the threshold can voluntarily apply for a VAT registration.

Using your own car or bike for work travel? You may be able to claim tax relief for business mileage.

If you are employed and spend your own money on items needed for your job, you may be eligible to claim tax relief on those expenses. However, you can usually only claim tax relief on items that are exclusively used for work purposes.

For example, you might be able to claim tax relief when using your own vehicle, whether it is a car, van, motorcycle or bicycle, for work-related travel. Generally, travel between home and your regular place of work does not qualify. However, if you travel to a temporary workplace or incur business mileage, tax relief is typically allowed.

Employers often reimburse mileage using a set rate per mile depending on the type of vehicle. HMRC publishes approved mileage rates that apply when employees use their own vehicles for business journeys. If your employer uses these rates, the reimbursement is not treated as a taxable benefit.

If you are reimbursed at a rate below the HMRC approved amount, you can claim tax relief on the difference through Mileage Allowance Relief. For cars, the rate is 45p per mile for the first 10,000 miles and 25p per mile thereafter. The rate is 20p per mile for bicycles and 24p per mile for motorcycles.

Additionally, there is a passenger payment of 5p per mile per colleague if you transport other employees during business journeys in a car or van.

Not sure if a business cost is deductible? HMRC’s ‘wholly and exclusively’ rule is the key test.

When deciding whether an expense is deductible or not it is important to bear in mind that the expenditure must be incurred wholly and exclusively for the purposes of your trade or employment. This is a difficult starting point as there is often a fine line to thread between deciding whether an expense meets this ‘wholly and exclusively’ rule.

In general, HMRC takes a slightly more relaxed view that a strict reading of the legislation would suggest. HMRC’s own internal manuals offers advice to HMRC inspectors to exercise care when applying the ‘wholly and exclusively’ test. The advice states that where there is an incidental benefit that does not, of itself, mean that the expenditure is disallowed.

The following example helps clarify this point. A self-employed consulting engineer may travel to exotic locations to advise on projects. The travel and the exotic locations may be benefits but where there was no private purpose they are incidental to the carrying on of the profession and the cost is allowable.

It is also possible to apportion part of an expense where necessary. For example, when considering the running costs of a car used partly for the purposes of the trade and partly for other purposes. HMRC’s position is that the costs associated with the business use of the car would be deductible.

1 October 2025 – Due date for Corporation Tax due for the year ended 31 December 2024.

19 October 2025 – PAYE and NIC deductions due for month ended 5 October 2025. (If you pay your tax electronically the due date is 22 October 2025.)

19 October 2025 – Filing deadline for the CIS300 monthly return for the month ended 5 October 2025. 

19 October 2025 – CIS tax deducted for the month ended 5 October 2025 is payable by today.

31 October 2025 – Latest date you can file a paper version of your 2024-25 self-assessment tax return.

1 November 2025 – Due date for Corporation Tax due for the year ended 31 January 2025.

19 November 2025 – PAYE and NIC deductions due for month ended 5 November 2025. (If you pay your tax electronically the due date is 22 November 2025.)

19 November 2025 – Filing deadline for the CIS300 monthly return for the month ended 5 November 2025. 

19 November 2025 – CIS tax deducted for the month ended 5 November 2025 is payable by today.

From 13 October 2025, access to Companies House WebFiling will require GOV.UK One Login. This replaces the older Government Gateway sign-in and is part of the wider move towards a single, more secure login across government services.

When you next log into WebFiling after that date, you will be prompted to connect your existing account to GOV.UK One Login. Without doing so, you will not be able to file company documents. This shift follows the earlier transition of the “Find and update company information” service in 2024.

The new login system provides additional benefits. It brings stronger security through two-factor authentication, reducing the risk of fraud and misuse. It also allows you to use one set of login details for multiple government services, cutting down on the need to manage different usernames and passwords. Over time, GOV.UK One Login will replace all other government login systems.

To prepare for the change, users should check that their WebFiling email address is up to date and accessible. If they also use the “Find and update company information” service, they should ensure both accounts use the same email address. It may be worth creating a GOV.UK One Login in advance using that same email. Companies House is also advising that users review and clean up their “My companies” list to remove any businesses they no longer file for.

Looking further ahead, identity verification becomes compulsory from 18 November 2025 for all new and existing directors and Persons with Significant Control. This can be completed voluntarily now via GOV.UK One Login or, alternatively, through an authorised agent.

In short, from mid-October WebFiling accounts must be connected to GOV.UK One Login. Preparing early will help avoid delays and ensure users are ready for the new identity checks that follow in November.