By James Mitchell · Last updated 2026-06-08
Why Good Accounting Matters
Good accounting is not just about satisfying HMRC — it is the foundation of a well-run business. Businesses that understand their numbers make better decisions, identify problems early, and are far more likely to survive and grow. Poor accounting, on the other hand, leads to cash flow crises, tax penalties, and missed opportunities.
This guide covers everything you need to set up your accounting correctly from day one.
Understanding the Basics
Cash vs Accrual Accounting
There are two main methods of accounting:
Cash basis accounting: You record income when you receive it and expenses when you pay them. Simple and intuitive. Suitable for most sole traders with turnover under £150,000. HMRC allows sole traders to use cash basis by default.
Accrual (traditional) accounting: You record income when it is earned (when you invoice) and expenses when they are incurred (when you receive the bill), regardless of when cash changes hands. Required for limited companies and larger businesses. Gives a more accurate picture of financial performance.
Key Financial Statements
• Profit and Loss (P&L) statement: Shows your income, expenses, and profit over a period. The most important statement for day-to-day management.
• Balance sheet: A snapshot of your assets, liabilities, and equity at a point in time. Required for limited companies.
• Cash flow statement: Shows how cash moves in and out of your business. Critical for managing cash flow.
Choosing Accounting Software
The right accounting software makes bookkeeping significantly easier, reduces errors, and saves time. For UK businesses, the main options are:
Xero
The most popular accounting software for UK small businesses. Excellent bank feeds, strong reporting, and integrates with hundreds of apps. Ideal for growing businesses.
• Price: £15–£47/month depending on plan
• Best for: Small to medium businesses, businesses with employees, those wanting strong reporting
• Pros: Excellent bank reconciliation, strong app ecosystem, good accountant collaboration tools
• Cons: More expensive than some alternatives; can be complex for very simple businesses
QuickBooks Online
Strong all-rounder with good invoicing, expense tracking, and payroll. Popular with accountants.
• Price: £12–£35/month
• Best for: Small businesses, freelancers, those needing payroll
• Pros: Good value, strong invoicing, built-in payroll option
• Cons: Bank feeds can be less reliable than Xero; interface can feel cluttered
FreeAgent
Designed specifically for freelancers and small businesses. Very user-friendly, with excellent self-assessment tax return preparation built in.
• Price: £19/month (free with some business bank accounts including NatWest, Royal Bank of Scotland, and Ulster Bank)
• Best for: Sole traders, freelancers, contractors
• Pros: Excellent for self-employed people, self-assessment integration, free with some banks
• Cons: Less suitable for businesses with complex needs or multiple employees
Sage Business Cloud Accounting
A long-established accounting software provider with strong UK roots. Good for businesses needing robust inventory management.
• Price: £15–£30/month
• Best for: Product-based businesses, those needing inventory management
• Pros: Strong inventory features, good VAT management, well-known brand
• Cons: Less modern interface than Xero or QuickBooks; more expensive for basic features
Wave (Free)
A free accounting software option suitable for very simple businesses.
• Price: Free (charges for payroll and payment processing)
• Best for: Very simple businesses, those just starting out
• Pros: Free, easy to use, good invoicing
• Cons: Limited features, no UK-specific tax support, no MTD compatibility
Making Tax Digital Compatibility
All paid accounting software options above are MTD-compatible. If you are VAT-registered, you must use MTD-compatible software. Wave is not MTD-compatible.
Setting Up Your Chart of Accounts
A chart of accounts is a list of all the financial accounts in your business. Most accounting software provides a default chart of accounts that you can customise. Key categories include:
Income accounts:
• Sales/Revenue
• Other income (grants, interest, etc.)
Expense accounts:
• Cost of goods sold (for product businesses)
• Staff costs (salaries, NI, pension)
• Premises (rent, rates, utilities)
• Travel and subsistence
• Marketing and advertising
• Professional fees (accountant, solicitor)
• IT and software
• Insurance
• Bank charges
• Depreciation
Balance sheet accounts (limited companies):
• Fixed assets (equipment, vehicles)
• Current assets (debtors, stock, cash)
• Current liabilities (creditors, VAT owed, PAYE owed)
• Long-term liabilities (loans)
• Equity (share capital, retained profits)
Bank Reconciliation
Bank reconciliation is the process of matching the transactions in your accounting software with your bank statement to ensure they agree. It is one of the most important bookkeeping tasks.
How to reconcile:
1. Import or manually enter your bank transactions into your accounting software
2. Match each bank transaction to the corresponding entry in your accounts
3. Investigate and resolve any discrepancies
4. Confirm the closing balance in your software matches your bank statement
How often: Weekly for busy businesses; monthly as a minimum. Most modern accounting software (Xero, QuickBooks) has automatic bank feeds that import transactions daily, making reconciliation much faster.
Invoicing Best Practices
Good invoicing is essential for cash flow and professionalism.
What every invoice must include (UK legal requirements):
• Your business name and address
• Your customer's name and address
• A unique invoice number
• The date of the invoice
• A description of the goods or services provided
• The amount charged (excluding VAT if applicable)
• If VAT-registered: your VAT registration number, the VAT rate, and the VAT amount
Best practices:
• Issue invoices promptly — the sooner you invoice, the sooner you get paid
• Set clear payment terms (14 or 30 days is standard)
• Send payment reminders before and after the due date
• Charge statutory interest on late payments (currently 8% above the Bank of England base rate) — this is your legal right under the Late Payment of Commercial Debts Act
• Use accounting software to automate reminders
Record Keeping Requirements
HMRC requires you to keep business records for:
• Sole traders: 5 years after the 31 January submission deadline for the relevant tax year
• Limited companies: 6 years from the end of the accounting period
Records you must keep:
• All sales invoices and receipts
• All purchase invoices and receipts
• Bank statements
• Payroll records (if you have employees)
• VAT records (if VAT-registered)
• Mileage logs (if claiming vehicle expenses)
• Details of assets purchased and sold
How to store records: HMRC accepts digital records. Use cloud accounting software and scan paper receipts using apps like Dext (formerly Receipt Bank), AutoEntry, or your accounting software's built-in receipt scanning feature.
Working With an Accountant
Many small business owners try to do their own accounting to save money. This is understandable, but there are strong arguments for working with an accountant, especially as your business grows.
What a good accountant does:
• Prepares and files your annual accounts and tax returns
• Advises on tax planning to minimise your bill
• Helps you understand your financial position
• Provides business advice and benchmarking
• Handles HMRC correspondence and enquiries
• Advises on the right business structure
Cost: A sole trader accountant typically costs £300–£800/year for basic compliance work. A limited company accountant costs £800–£2,500/year. Specialist tax planning advice is charged separately.
Finding an accountant: Look for a qualified accountant (ACA, ACCA, or CIMA qualified). Ask for recommendations from other business owners. Many accountants specialise in particular industries or business types.
Monthly Financial Checklist
Establish a monthly financial routine to stay on top of your accounts:
• Reconcile your bank account
• Review your profit and loss statement
• Chase any outstanding invoices
• Review your cash flow forecast for the next 3 months
• Set aside money for tax (aim for 25–30% of profits)
• Review and categorise expenses
• File VAT return (if due that month)
• Pay PAYE and NI (if you have employees)
Frequently asked questions
Do I need accounting software or can I use a spreadsheet?
A spreadsheet can work for very simple businesses, but accounting software is strongly recommended. It saves significant time through bank feeds and automation, reduces errors, is MTD-compatible (required for VAT-registered businesses), makes it easier to collaborate with an accountant, and provides instant financial reports. The cost (£15–£30/month) is almost always worth it.
What is the difference between bookkeeping and accounting?
Bookkeeping is the day-to-day recording of financial transactions — entering invoices, reconciling the bank, categorising expenses. Accounting involves interpreting and analysing those records — preparing financial statements, calculating tax, providing financial advice. Many small businesses do their own bookkeeping and use an accountant for the higher-level work.
When should I hire an accountant?
From the start, if you can afford it — a good accountant pays for themselves through tax savings and advice. At minimum, hire an accountant when you incorporate as a limited company (the compliance requirements are more complex), when your turnover exceeds £50,000, when you take on employees, or when you are facing an HMRC enquiry.
What is Making Tax Digital and how does it affect my accounting?
Making Tax Digital (MTD) is HMRC's programme to digitalise the tax system. MTD for VAT is already mandatory — all VAT-registered businesses must use MTD-compatible software and submit VAT returns digitally. For 2026/27, MTD for Income Tax applies from 6 April 2026 where qualifying income is above £50,000; HMRC plans staged expansion to above £30,000 from April 2027 and above £20,000 from April 2028. You will need compatible software and quarterly updates where the rules apply.
How do I handle expenses paid from my personal account?
If you pay a business expense from your personal account, record it in your accounting software as a 'director's loan' or 'owner's contribution' (for limited companies) or simply as a business expense paid by the owner (for sole traders). Reimburse yourself from the business account. Keep the receipt. Most accounting software has a simple way to record these.
How much should I set aside for tax?
As a rough guide, set aside 20–30% of your profits for tax. Sole traders should aim for 25–30% to cover Income Tax and National Insurance. Limited company directors taking salary and dividends should set aside 20–25%. If you are VAT-registered, also set aside the VAT you collect from customers — it is not your money. Use a separate savings pot or account for tax funds.