What Every Business Owner Should Know About Tax Accounting

Running a business is exciting but comes with financial responsibilities. Getting it right means avoiding penalties, maximising savings, and keeping your business financially healthy. Yet, many business owners feel overwhelmed by tax rules, HMRC deadlines, and financial jargon.

In this guide, we break down everything you need to know about tax accounting, from expenses you can actually claim, to strategies that reduce your tax bill.

Consideration 1: Understanding Business Taxes & What You Need to Pay

  • Corporation Tax: If you run a limited company, you must pay Corporation Tax on profits (currently 19%-25%depending on your profit level).
  • Self-Assessment Tax: If you’re a sole trader or in a partnership, you’ll pay income tax on profits via Self Assessment, and if your income exceeds £50,000 from 2026 you will need to report quarterly, similarly to VAT Returns.
  • VAT: If your turnover exceeds £90,000, in a 12 month period, you must register for VAT and submit quarterly VAT returns.
  • PAYE & National Insurance: If you have employees (or pay yourself a salary), you must handle PAYE payroll and National Insurance Contributions.
  • Business Rates: If you operate from a commercial property, you may need to pay business rates (similar to council tax for businesses).

Layers Insight 💡: It can be quite confusing at first keeping track of all the different deadlines, one of the reasons, we actively encourage all business owners to setup both the companies and their own Government Gateway and add each of the taxes onto it, it’ll be a hub for you to always check where you are at, if you really want to you can setup Direct Debts that help keep you compliant, avoid those penalties!

Consideration 2: Expenses Your Business Can Actually Claim

One of the biggest mistakes business owners make is not claiming all allowable expenses, meaning they pay more tax than necessary. HMRC allows you to deduct certain costs (wholly and exclusively for the trade) before calculating your taxable profit, including:

  • Office Costs: Rent, utilities, internet, software (e.g., Xero), and office supplies.
  • Staff Wages & Pensions: Salaries, National Insurance contributions, and employer pension contributions.
  • Marketing & Advertising: Website costs, online ads, business cards, and promotional materials.
  • Travel & Mileage: Train tickets, fuel (if business-related), and business trip expenses.
  • Professional Fees: Accountant, legal fees, and industry memberships (e.g., Chamber of Commerce).
  • Business Insurance: Public liability insurance, professional indemnity, and employer’s liability insurance.

Layers Insight 💡: In practice, we find business owners worried about what they can and can’t claim, and we find they will air on the side of caution (Rightly so!) but when you come to us, we need to help understand what expenses you might have, so track all business expenses and store digital receipts; this will make tax returns easier and help avoid errors. If you aren’t sure on what you can claim - ask away!

Consideration 3: Reducing Your Business Tax Bill Legally

Smart tax planning isn’t about avoidance—it’s about making the most of tax-efficient strategies. Here’s how to lower your tax liability:

  • Claim R&D Tax Relief: If your business invests in research, you may qualify for tax credits worth up to 33% of R&D costs.
  • Use the £1M Annual Investment Allowance: Buying equipment? Claim 100% tax relief on qualifying assets like machinery, tools, and office furniture, bring forward purchases you know you will make in the coming months into the current tax year to save on tax sooner.
  • Optimise Salary & Dividends: If you’re a company director, taking a mix of salary and dividends can reduce personal tax and National Insurance.
  • Pension Contributions: Employer pension contributions reduce Corporation Tax while helping you save for the future.
  • Work from Home? Claim Allowances: If you run your business from home, claim part of your utility bills, internet, and rent as business expenses.

Layers Insight 💡: Sometimes, it’s worth paying the tax due, as to save tax you have to spend it, and it might not align with your current goals of growth or expansion. A common misconception is that by spending £100 you reduce your tax bill by the same amount, you save between 19-25% (as a Limited company) of what you spend, as it reduces your taxable profit by that amount, which we use to calculate your tax bill on!

Review your tax strategy before the tax year ends to take advantage of available reliefs.

Consideration 4: Avoiding HMRC Penalties & Late Fees

Missing HMRC deadlines can result in hefty penalties and unnecessary stress. Here are key dates every business owner must remember:

  • Corporation Tax Deadline: Pay within 9 months and 1 day after your financial year ends.
  • Self-Assessment Deadline: Paper returns: 31 October / Online returns: 31 January.
  • VAT Returns: Due quarterly, usually one month after the VAT period ends.
  • PAYE & National Insurance: Monthly or quarterly depending on your payroll setup.
  • Confirmation Statement: Limited companies must submit this annually to Companies House.

Layers Insight 💡: Much like in consideration 1, the same advice applies here!

It can be quite confusing at first keeping track of all the different deadlines, one of the reasons, we actively encourage all business owners to setup both the companies and their own Government Gateway and add each of the taxes onto it, it’ll be a hub for you to always check where you are at, if you really want to you can setup Direct Debts that help keep you compliant, avoid those penalties!

Consideration 5: Why Every Business Needs an Accountant (Even Small Ones!)

Many small business owners try to handle tax accounting themselves, but this can lead to errors, missed savings, and wasted time. Here’s why hiring an accountant is a smart move:

  • Stay Compliant: Avoid HMRC fines by ensuring correct filings.
  • Maximise Tax Savings: Claim all allowances and structure finances efficiently.
  • Better Financial Planning: Get real-time insights into your business cash flow and profitability.
  • Save Time: Focus on growing your business instead of dealing with tax admin.
  • Get Strategic Advice: Beyond tax returns, an accountant helps with business growth and scaling strategies.

Layers Insight 💡: There are accountants for all levels of business, and costs to access accountants can be very reasonable at all levels, in some situations you maybe able to self-serve. In my experience, we tend to find it’s always worth having a chat with a professional, as you may be making costly errors. Our advice is find an accountant who is approachable, and supports your business beyond just compliance.

Final Thoughts: Get Tax & Compliance Right, Grow Faster

Tax & accounting doesn’t have to be overwhelming. By planning ahead, tracking expenses, and working with the right accountant, you can stay compliant, reduce tax, and focus on business growth.

Need a business accountant in Cheltenham? At Layers Accountancy, we help businesses with tax planning, bookkeeping, and financial strategy. Get in touch today for a free consultation!

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