The Complete Small Business Accounting Checklist

Your practical guide to accounting records, registrations, tax returns and important deadlines

Running a small business means juggling many responsibilities. Alongside looking after customers, managing suppliers and growing your business, there are accounting, tax and record-keeping requirements that need regular attention.

Whether you're starting a new business or have been trading for years, knowing what needs to be done — and when — can help you stay organised, avoid penalties and make better financial decisions.

At Craigerne Accountancy, we've created this practical checklist to help small business owners understand their key accounting and tax responsibilities.

You don't necessarily need to do everything yourself, but it's important to understand what your business is responsible for.

Who is this guide for?

This guide is designed for UK small business owners, including:

• Sole traders and self-employed individuals

• Partnerships

• Limited companies

• Tradespeople and contractors

• Consultants, freelancers and professional service businesses

• Independent retailers and other small businesses

Not every requirement applies to every business. Your obligations will depend on your business structure, turnover, activities and whether you employ staff.

Do you own rental property?

Landlords and property investors have some different accounting and tax responsibilities, including the treatment of rental income, mortgage interest, allowable expenses and property disposals.

We cover these separately in our Complete Landlord Accounting and Tax Checklist.

If you operate a business and also receive rental income, both guides may be relevant.

Part 1: Getting started — registrations and setup

When starting a business, there are several important decisions and registrations to consider.

Use this checklist to make sure you have the foundations in place.

1. Choose your business structure

• Decide whether to operate as a sole trader, partnership or limited company.

• Understand the tax and reporting obligations of your chosen structure.

• Consider whether your business structure remains appropriate as the business grows.

A sole trader operates a business personally, whereas a limited company is a separate legal entity with its own reporting responsibilities.

Neither structure is automatically better. The right choice depends on factors including profitability, risk, administration and how you intend to take money from the business.

2. Register your business

• Sole trader: Check whether you need to register for Self Assessment with HMRC.

• Partnership: Register the partnership and arrange the necessary partner tax registrations.

• Limited company: Incorporate the company with Companies House.

• Limited company: Ensure HMRC is notified when the company becomes active for Corporation Tax.

• Check whether any industry-specific registrations or licences are required.

Sole traders generally need to register for Self Assessment if gross trading income exceeds £1,000 in a tax year, although other circumstances may also trigger a filing requirement.

Where registration for Self Assessment is required, the usual deadline for notifying HMRC is 5 October following the relevant tax year.

3. Set up your finances

• Open a dedicated business bank account.

• Choose how you will issue invoices and collect payments.

• Set up an accounting or bookkeeping system.

• Establish a method for keeping receipts and supporting documents.

• Consider setting aside money regularly for future tax bills.

• Decide whether you need professional accounting or bookkeeping support.

For limited companies, keeping company funds separate from personal funds is particularly important.

A separate business account is also strongly recommended for sole traders, even where it is not legally required.

Craigerne tip: Good accounting habits are much easier to establish at the beginning than to introduce after several years of trading.

4. Check VAT and payroll requirements

• Determine whether VAT registration is required.

• Consider whether voluntary VAT registration may be beneficial.

• Register for PAYE if required before paying employees or directors.

• Check workplace pension obligations if you employ staff.

• Consider whether Making Tax Digital affects your business.

The compulsory VAT registration threshold is currently £90,000 of taxable turnover, generally assessed over a rolling 12-month period. A separate test applies where taxable turnover is expected to exceed the threshold in the next 30 days alone.

Part 2: Keeping the right accounting records

Accurate financial records are one of the most important parts of running a business.

They help you calculate tax correctly, understand business performance and provide supporting evidence if HMRC requests information.

1. Keep records of business income

• Sales invoices issued to customers

• Payments received from customers

• Cash sales and receipts

• Credit notes and refunds

• Other business income

• Outstanding customer balances

Make sure you can identify what income relates to, when it arose and whether the customer has paid.

2. Keep records of business expenditure

• Supplier invoices and receipts

• Materials and stock purchases

• Rent, utilities and premises costs

• Business insurance

• Software and subscriptions

• Marketing and advertising costs

• Vehicle and travel costs

• Professional fees

• Equipment and other asset purchases

• Staff wages and related costs

Remember that not every business payment is automatically tax deductible.

Some expenses may be restricted, partly private or treated as capital expenditure.

3. Maintain other important financial records

Depending on your business, you should also retain:

• Business bank and credit card statements

• Loan agreements and repayment schedules

• Stock and inventory records

• Records of assets owned by the business

• VAT records, where applicable

• Payroll and pension records

• Records of money introduced or withdrawn by owners

• Director's loan account records, where applicable

• Dividend documentation for limited companies

How long should you keep your records?

For self-employed individuals, records generally need to be retained for at least five years after the 31 January Self Assessment filing deadline for the relevant tax year.

Limited companies generally need to retain accounting records for six years from the end of the relevant financial year.

Longer retention periods may apply in some circumstances.

Craigerne tip: Use a consistent digital filing system and capture receipts when expenses occur. A photograph or digital copy is often much easier to locate than a paper receipt several years later.

Part 3: Weekly and monthly accounting tasks

Many accounting problems arise not because business owners fail to understand their obligations, but because bookkeeping is left until the year-end.

A simple routine can help prevent this.

1. Weekly bookkeeping checklist

• Issue invoices for work completed.

• Record customer payments received.

• Record new business expenses.

• Save receipts and purchase invoices.

• Check outstanding invoices and chase overdue customers.

• Keep cash transactions up to date.

For a business with relatively few transactions, these tasks may only take a short time each week.

2. Monthly accounting checklist

• Reconcile bank accounts with your bookkeeping records.

• Check customer and supplier balances.

• Review monthly income and expenses.

• Monitor cash flow and upcoming payments.

• Review profitability.

• Set aside money for tax liabilities.

• Check turnover against the VAT threshold.

• Review payroll, pension and PAYE obligations where applicable.

• Check for any upcoming filing or payment deadlines.

Business owners should also keep an eye on whether the business is making a profit, not simply whether there is money in the bank.

A healthy bank balance does not necessarily mean that all future tax bills and other liabilities have been provided for.

Part 4: VAT and Making Tax Digital

1. VAT responsibilities

VAT registration brings additional bookkeeping and reporting responsibilities.

If your business is VAT registered:

• Issue invoices with the required VAT information.

• Record VAT charged on sales.

• Record recoverable VAT on purchases.

• Maintain the required digital records.

• Use Making Tax Digital-compatible software.

• Submit VAT Returns when due.

• Pay VAT owed to HMRC by the relevant deadline.

• Review whether your chosen VAT scheme remains appropriate.

Most VAT-registered businesses submit VAT Returns quarterly.

The usual filing and payment deadline is one calendar month and seven days after the VAT accounting period ends.

Even if no VAT is payable, a VAT Return will normally still be required.

2. Making Tax Digital for Income Tax

Making Tax Digital (MTD) is changing the way many sole traders and landlords report income and expenses to HMRC.

Rather than relying solely on an annual process, affected individuals must maintain digital records using compatible software and submit quarterly updates, alongside their annual tax return.

When does MTD apply?

Start date / Qualifying income:

• 6 April 2026: Over £50,000

• 6 April 2027: Over £30,000

• 6 April 2028: Over £20,000

Qualifying income generally means gross income from self-employment and property combined, before expenses, assessed using the relevant earlier tax return.

If MTD applies to you:

• Confirm your start date.

• Choose suitable compatible software.

• Arrange the necessary HMRC sign-up.

• Maintain digital income and expenditure records.

• Submit quarterly updates by the applicable deadlines.

• Complete your annual tax return.

MTD for Income Tax applies to qualifying individuals, not directly to limited companies simply because they have a similar turnover.

Craigerne tip: If your business is approaching the relevant MTD threshold, reviewing your bookkeeping system before the rules apply can make the transition considerably easier. Refer to our MTD Guide for more information.

Part 5: Annual responsibilities for sole traders and partnerships

1. Sole trader annual checklist

Sole traders normally report their business income and expenses through Self Assessment.

• Ensure income and expense records are complete.

• Calculate annual business profit or loss.

• Review allowable business expenses and tax reliefs.

• Prepare and submit your Self Assessment tax return.

• Check your Income Tax and National Insurance liability.

• Make any required payments on account.

• Review whether your business needs to comply with MTD.

Important Self Assessment dates

Deadline / Requirement:

• 5 October: Register or notify HMRC where required for the preceding tax year

• 31 January: Online Self Assessment return deadline and balancing tax payment

• 31 July: Second payment on account, where applicable

For example, the online tax return for the 2025/26 tax year is normally due by 31 January 2027.

Payments on account can sometimes be unexpected for new business owners, particularly when paying their first substantial Self Assessment tax bill.

Understanding these payments in advance can help avoid cash-flow difficulties. Refer to our Self-Assessment Guide for more information.

2. Partnership annual checklist

Partnerships have additional reporting requirements.

• Maintain the partnership's financial records.

• Prepare annual partnership accounts.

• Calculate the allocation of profits or losses between partners.

• Submit the partnership tax return where required.

• Ensure individual partners include their share of partnership income on their own tax returns.

• Review any relevant VAT, payroll and other obligations.

Different rules can apply to limited liability partnerships.

Part 6: Annual responsibilities for limited companies

Limited companies have separate legal and financial reporting responsibilities.

Even where an accountant prepares the documents, company directors remain responsible for ensuring the company's statutory obligations are met.

1. Limited company annual checklist

• Prepare annual statutory accounts.

• File annual accounts with Companies House.

• Prepare and submit the Corporation Tax Return (CT600).

• Calculate and pay Corporation Tax.

• File the annual confirmation statement.

• Keep company details and statutory registers up to date.

• Meet applicable Companies House identity verification requirements.

• Review directors' salaries, dividends and loan accounts.

• Ensure dividend decisions and documentation are properly recorded.

• Review VAT, PAYE and pension obligations.

• Check whether individual directors have personal tax return obligations.

2. Key limited company deadlines

For most established private limited companies:

Requirement / Usual deadline:

• Annual accounts: 9 months after the financial year-end

• Corporation Tax payment: 9 months and 1 day after the relevant accounting period

• Corporation Tax Return: 12 months after the relevant accounting period

• Confirmation statement: At least annually, normally within 14 days after the review period

First accounts, some larger Corporation Tax liabilities and certain other circumstances may be subject to different deadlines.

A confirmation statement is generally required even where no company details have changed.

Craigerne tip: Corporation Tax payment and filing deadlines are different. You may need to pay the tax before the return itself is due.

Part 7: Payroll and employees

Employing staff adds further accounting and reporting responsibilities.

1. Employer checklist

• Register for PAYE where required.

• Maintain employee information and payroll records.

• Calculate wages, PAYE and National Insurance.

• Submit payroll information to HMRC under Real Time Information (RTI).

• Pay PAYE and National Insurance by the appropriate deadlines.

• Assess workplace pension automatic enrolment obligations.

• Pay employer pension contributions where required.

• Provide employee payslips.

• Complete relevant year-end payroll reporting.

• Check statutory payment, minimum wage and other employment requirements.

Some owner-managed limited companies operate payroll for directors even when they have no other employees.

The specific PAYE and workplace pension requirements will depend on individual circumstances.

Part 8: Other obligations worth checking

Depending on your business activities, further registrations or reporting requirements may apply.

• Construction Industry Scheme (CIS)

• Business insurance and employers' liability insurance

• Data protection and ICO requirements

• Business rates for commercial premises

• Industry-specific licences and registrations

• Import and export requirements

• Tax implications of business vehicles, assets and financing

• Tax treatment of benefits provided to directors and employees

This is not an exhaustive list, but it highlights areas that can sometimes be overlooked.

Part 9: Your small business accounting calendar

The following summary brings together the main routines covered in this guide.

When / What to check:

• When starting: Business structure, HMRC registration, bank account, bookkeeping and VAT/PAYE requirements

• Weekly: Sales invoices, payments, expenses and receipts

• Monthly: Bank reconciliation, cash flow, outstanding invoices, bookkeeping and payroll

• Quarterly: VAT Returns and MTD updates where applicable; profit and tax reviews

• Annually: Accounts, tax returns, tax payments, confirmation statements and other statutory requirements

Not every business will have quarterly or annual obligations under every category. Your particular deadlines should be recorded in a calendar and reviewed regularly.

Part 10: When should you use an accountant?

Some small business owners are happy to manage their everyday bookkeeping themselves.

However, there is a difference between recording transactions and ensuring the business meets all its accounting and tax obligations.

An accountant can help you:

• Understand which registrations and returns are required.

• Prepare annual accounts and tax returns.

• Stay on top of deadlines.

• Identify available tax reliefs and allowable expenses.

• Manage VAT, payroll and Making Tax Digital.

• Understand business profitability and cash flow.

• Plan for upcoming tax liabilities.

• Review whether your business structure remains appropriate.

Professional support can be particularly useful when starting a business, becoming VAT registered, employing staff, forming a limited company or experiencing significant growth.

How Craigerne Accountancy can help

Craigerne Accountancy is based in Peebles and provides accounting and tax services to small businesses across the Scottish Borders.

As ICAS Chartered Accountants, we understand that most business owners would rather spend their time running their business than worrying about accounting paperwork and tax deadlines.

We offer a range of services, including:

• Annual accounts and Corporation Tax

• Self Assessment tax returns

• VAT Returns and advice

• Bookkeeping and cloud accounting

• Payroll

• Making Tax Digital support

• Business accounting and tax advice

Our approach is straightforward: practical advice, personal service and transparent fixed-fee pricing.

Need help with your small business accounts?

Whether you're starting a business, looking for help with your annual accounts or simply want reassurance that your accounting obligations are being met, we'd be happy to help.

Contact Craigerne Accountancy to discuss your requirements.

Last reviewed: October 2026.

This guide provides general information on UK accounting and tax requirements. Requirements and deadlines may vary according to business circumstances, and legislation can change. The guide should not be treated as a substitute for professional advice specific to your business.

Making Tax Digital for Income Tax: What You Need to Know

Making Tax Digital (MTD) for Income Tax is now being introduced by HMRC.

If you're self-employed or a landlord, it's important to understand whether the new rules apply to you and what you need to do before your start date.

The good news is that, with the right software and a little preparation, the transition is usually straightforward.

What is Making Tax Digital?

MTD is HMRC's programme to modernise the UK tax system.

Instead of keeping paper records and completing one annual Self Assessment tax return, affected taxpayers will:

• Keep digital accounting records.

• Use HMRC-compatible software.

• Submit quarterly updates to HMRC.

• Complete a Final Declaration after the end of the tax year.

The aim is to make tax reporting more accurate while giving taxpayers a better view of their finances throughout the year.

Who Needs to Comply?

MTD for Income Tax is being introduced in stages based on your total qualifying income from self-employment and property.

• From April 2026: Individuals with qualifying income over £50,000.

• From April 2027: Individuals with qualifying income over £30,000.

• Expected from April 2028: Individuals with qualifying income over £20,000, subject to legislation.

What is qualifying income?

The MTD income threshold is based on your qualifying gross income from self-employment and property businesses before expenses are deducted. This includes UK property income and may also include overseas property or self-employment income if it forms part of your UK Income Tax reporting. Employment income, dividends and pension income do not count towards the threshold.

If you're unsure whether the rules apply to you, we're happy to help.

When Is My First MTD Submission Due?

If you join Making Tax Digital from 6 April 2026, your first quarterly reporting period covers: 6 April 2026 to 5 July 2026. Your first quarterly update must be submitted to HMRC by 7 August 2026, just over one month after the quarter end.

Other reporting period and submission deadlines are as follows:

• Quarter 2: Period covered: 6 July to 5 October. Submission deadline: 7 November

• Quarter 3: Period covered: 6 October to 5 January. Submission deadline: 7 February

• Quarter 4. Period covered: 6 January to 5 April. Submission deadline: 7 May

After your fourth quarterly update, you'll complete a Final Declaration, which replaces much of the current Self Assessment reporting process. This is normally due by 31 January following the end of the tax year.

Note - these are the standard quarterly periods. Some businesses may instead use calendar quarters (1 April to 30 June etc.) depending on their software and accounting period.

Do I need to pay tax quarterly now?

No, quarterly updates do not mean you'll pay tax every three months.

They simply keep HMRC updated on your income and expenses. Your tax payment dates remain unchanged.

What Should You Do Now?

If you think MTD may apply to you, we recommend taking these simple steps.

1. Check your income

Work out your annual self-employment and rental income to see whether you exceed the relevant threshold.

2. Move to digital records

If you're still relying on paper records or spreadsheets, now is the ideal time to move to digital bookkeeping.

3. Choose compatible software

You'll need HMRC-compatible software to comply with MTD. Choosing the right software now will make the transition much easier.

4. Get everything ready before your deadline. Don't wait until your first quarterly submission is due.

Setting everything up in advance gives you time to become familiar with the software and avoids unnecessary stress.

Do I Need Accounting Software?

Yes. Most taxpayers affected by MTD will need HMRC-compatible accounting software.

While spreadsheets can still be used in certain circumstances, they generally need to be linked to compatible software to meet HMRC's digital requirements.

Cloud accounting software also offers several additional benefits:

• Keep your records organised throughout the year.

• See your income and expenses in real time.

• Reduce paperwork.

• Estimate your tax position earlier.

• Make year-end tax reporting much simpler.

How Craigerne Accountancy Can Help

Making Tax Digital doesn't have to be complicated.

At Craigerne Accountancy, we can help you:

• Confirm whether MTD applies to you.

• Calculate whether you meet the income thresholds.

• Recommend suitable accounting software.

• Set up your digital bookkeeping.

• Prepare and submit your quarterly updates.

• Complete your Final Declaration.

• Provide ongoing support throughout the year.

Whether you're self-employed, a landlord, or both, we'll ensure you stay compliant while keeping the process as straightforward as possible.

Get in touch today to make your transition to Making Tax Digital simple and stress-free.