UK Small Business Checklist: What to Prioritise This September
The school run is back, the diary’s filling up, and for most small businesses September marks the real start of autumn planning. Rather than reacting once deadlines land, here’s what’s actually worth doing this month, and why.
1. Start Preparing for the Autumn Budget Now
Chancellor John Healey delivers his first Budget on Wednesday 28 October, alongside the Office for Budget Responsibility’s economic forecast. No tax measures have been confirmed yet, so treat any headlines about specific rate changes as speculation for now.
What to do this month:
- Review your current-year allowances; dividends, pensions, capital allowances; so tightened reliefs don’t catch you out.
- If you want a voice in the process, some business groups are still accepting evidence for the Treasury, with several submission windows closing in early September.
- Hold off on big financial commitments based on Budget rumours. Plan around today’s rules and revisit once measures are confirmed.
2. Check Your Companies House Identity Verification Deadline
If you’re a company director or a Person with Significant Control (PSC), identity verification has been a legal requirement since November 2025, with a 12-month transition period. The hard deadline for existing directors and PSCs is 18 November 2026, but in practice, you need to verify by your company’s next confirmation statement. If that falls in September, October or November, sort it now.
- It takes 10–20 minutes via GOV.UK One Login, using a passport or driving licence.
- Director on more than one company? Your working deadline is whichever confirmation statement is due first.
- Miss it, and filing is blocked entirely, your accountant can’t submit your confirmation statement without your personal verification code.
3. Get Ahead of Rising Energy Costs
Ofgem’s new price cap for 1 October–31 December was announced on 26 August. This quarter has an added twist: VAT on domestic electricity bills is being removed from 1 October, which softens the headline rise but makes like-for-like comparisons harder to read.
If your business runs on a variable commercial tariff, common for small units and home-based businesses on domestic-style contracts, it’s worth:
- Checking whether you’re still on a default or variable tariff and comparing fixed deals before winter demand pushes prices up.
- Building a Q4 energy cost increase into your budget regardless of the exact percentage, since wholesale prices remain volatile.
- Factoring any energy-heavy activity e.g. Christmas lighting, extended trading hours, cold storage, into your cash flow forecast now.
4. Model Your Q4 Cash Flow
September is the natural point to map out October–December, especially with a Budget landing at the end of the month that could shift National Insurance, business rates, or allowances with little notice.
Worth doing now:
- Extend your cash flow forecast past the Budget date and the following few weeks, so a rate change mid-quarter doesn’t catch you out.
- Chase outstanding invoices before the pre-Christmas admin crunch, accounts teams get harder to reach from late November.
- If you employ staff, sense-check payroll costs against rumoured changes to Employer NI or the phased-in Employment Rights Bill measures.
5. Start Peak-Season Prep - Yes, Already!
If you sell physical products, September is genuinely the last comfortable month to place stock orders for the golden quarter. Supplier lead times stretch fast from October, especially for anything shipped from overseas. Service and B2B businesses feel it too, with a productivity cliff typically hitting from early December.
- Lock in supplier orders and freight bookings before capacity tightens.
- Book seasonal staff or contractor cover now, good temporary staff go fast.
- Draft your autumn/Christmas marketing calendar so campaigns aren’t rushed together in November.
6. Sector-Specific Watchpoints
- Pubs, social clubs and live music venues: a confirmed 20% business rates cut doesn’t take effect until the 2027/28 rates year (April 2027), useful for medium-term planning, not immediate cash flow.
- Retail and hospitality: watch Labour’s party conference in late September, where speeches from the PM and Chancellor often hint at what’s coming in the Budget.
- Cash ISA and business savings holders: ISA allowance changes take effect from April 2027, plenty of time, but worth knowing they’re on the way.
The Bottom Line
Nothing here calls for panic, but September rewards the businesses that plan rather than react. Sort your Companies House verification, model Q4 cash flow around the Budget date, and get peak-season logistics moving before the market tightens. Do this quietly now, and November and December will feel a lot calmer.
This post reflects the UK regulatory and economic landscape as of late August 2026. Budget details were unconfirmed at the time of writing, check official guidance before acting on any of the above.
