What accounting and finance services does Flintham Mackenzie offer?

We offer a full range of business and personal accountancy services, bookkeeping, Corporation Tax planning, VAT, payroll, audit & assurance, business start-up support, and cloud accounting on Xero, QuickBooks and Sage. On the personal side, we also help with self-assessment, estate planning, and retirement strategies.

Where is your London office located?

Our head office is on Chiswick High Road (277-279 Chiswick High Road, Chiswick, London, W4 4PU), with a second office in Southgate, North London (286c Chase Road, N14 6HF). We've also got offices in Geneva, Dubai and New Delhi for clients with international operations.

Which industries do you specialise in?

We've built up strong sector expertise in construction, retail, manufacturing, medical & pharmacy, investment & financial services, hospitality, and e-commerce so the advice you get is geared to the real challenges your industry faces, not generic guidance.

How do I get started with Flintham Mackenzie?

It's straightforward. Book a free discovery call so we can get to know your business and what you need. From there, we put together a tailored proposal with clear, upfront pricing (no hidden costs), then get you set up on our cloud accounting tools.

Do you support businesses outside the UK?

Yes. As well as our Chiswick and Southgate offices, we support international clients through Geneva, Dubai and New Delhi, helping with cross-border tax planning, compliance and financial management.

UK Financial Update - October 2026: Tax Rates, Deadlines and Key Changes for Businesses

By Admin • 27 October 2026

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October is a good month for UK companies to go over their finances, get ready for deadlines coming up and check their operating costs. Money owed to companies from HMRC, Making Tax Digital, and National Insurance are just a few of the rules affecting finances companies need to be aware of.

October 2026 Accounting, tax and business advice FMLLP can help you understand your financial responsibilities. Six places to check today are:

HMRC Late Payment Interest Rate October 2026

If you are a business and you owe tax that is not paid by the due date, then the rate of late payment interest is a key factor. After the Bank of England base rate dropped in December 2025, HMRC late-payment interest rate October 2026 will be set at 7.75% from 9 January 2026.

Late payment interest is payable on unpaid Corporation Tax, VAT, PAYE and other taxes. Companies can ensure they do not pay any more than they need to by keeping adequate reserves and paying their tax liabilities by the due date.

Corporation Tax Deadline 2026

The Corporation tax deadline 2026 is based on your accounting period. Corporation Tax is payable nine months and one day after the accounting period. In most cases, the Company Tax Return is due 12 months after the end of the accounting period.

So, for example, a company with a year end of 31 December 2025 will normally need to pay its Corporation Tax by 1 October 2026, and the filing deadline for the return will be by 31 December 2026.

Ensure your business's liabilities are calculated in advance and that they can be paid as part of your cash-flow planning. Accounts in hand before the due date will ease the pressure on directors.

VAT Registration Threshold 2026

The VAT registration threshold 2026 is £90,000 taxable turnover. Is business liable to register for VAT? If your taxable turnover is over the current VAT registration threshold of £90,000 in a 12 month period or you expect to go over this within 30 days you are required to register for VAT.

For small firms it is also important to do more regular checks on turnover rather than annually to help them prepare for registration (if, for example, it is likely to be below the registration threshold).

Making Tax Digital ITSA 2026: Who Does It Affect?

You may be interested to know it will apply to the self-employed and those with landlords with a certain level of non-savings and non-dividend income.

Participants typically need to keep digital records and be able to send reports of updates to HMRC using compatible software. It will be rolled out over a number of years, and further income levels will include more taxpayers as the system develops.

Sole traders and landlords should check they are eligible, look at their bookkeeping process and prepare suitable software if needed. Getting in early will help ensure a smooth changeover.

Bank of England Base Rate September 2026

The Bank of England base rate September 2026 was 3.75% when it dropped in December 2025. Check the Bank of England's official releases for any further reductions before making decisions.

The base rate affects the cost of borrowing, business loans and mortgages, as well as saving rates. If a company has a variable-rate borrowing, it's worth revisiting their budgets to see how a shift in rates might impact monthly repayments.

Class 1 National Insurance Rate 2026

Insurance rate 2026 takes these calculations into account when estimating payroll expenditure. The normal rate that employers pay is 15% on all earnings above the secondary threshold (which varies). Employees pay 8% on any earning between the primary threshold (which varies) and upper earnings limit and 2% above the upper limit.

If this is the case, payroll calculations should be completed using the thresholds and contributions category applicable. Maintaining accurate payroll records can help identify errors.

How Businesses Can Prepare

October is a good month to review tax liabilities, identify any impending deadlines, track VAT turnover and ensure Making Tax Digital is relevant. An understanding of payroll, borrowing liabilities and cash balances will also be useful.

FMLLP provides accounting, tax and business advisory to assist businesses in organizing their financials and planning for the future. Visit FMLLP for more details.

Having up to date financial records and getting professional advice when required can help a business to stay compliant and to make decisions that are better informed.