What Is the Best Bookkeeping Method for Small Businesses?

Keeping track of your business finances can feel like a chore, especially when you are busy looking after customers, managing properties or growing your business.

You might be wondering whether you should use a spreadsheet, invest in accounting software or keep everything on paper. You may also have heard of cash basis accounting and traditional accounting, but are unsure which is right for you.

The good news is that bookkeeping does not have to be complicated. The best method is one that suits your business, helps you keep accurate records and makes it easier to understand your finances.

At DUO Accountants, we believe managing your business finances should be straightforward. In this guide, we explain the different bookkeeping options available to UK small businesses, their advantages and disadvantages, and how to choose the right approach for you.

What Is Bookkeeping?

Bookkeeping is the process of recording and organising the money coming into and going out of your business.

This includes keeping track of:

• Sales and customer payments.

• Business expenses and supplier invoices.

• Bank transactions.

• Money customers owe you.

• Bills you still need to pay.

• VAT records, if you are VAT registered.

• Payroll records, if you employ staff.

Good bookkeeping helps you understand how your business is performing, prepare your tax returns and make informed financial decisions.

According to Business.gov.uk's guidance on setting up business accounting, keeping accurate records can also help you plan your budget and understand what your business owes and what is owed to you.

What Are the Different Bookkeeping Methods?

When choosing a bookkeeping method, it helps to understand that there are two separate decisions to make:

1. How you record your transactions: for example, using paper records, spreadsheets or accounting software.

2. How you account for income and expenses: for example, using cash basis accounting or traditional accounting.

Let's look at each option.

1. Paper-Based Bookkeeping

Paper-based bookkeeping involves recording your income and expenses in a notebook, ledger or physical filing system. You might keep paper copies of invoices, receipts and bank statements in folders.

Advantages

• It is inexpensive to get started.

• You do not need specialist software.

• It can be useful for businesses with very few transactions.

Disadvantages

• Adding up figures and calculating totals takes time.

• Receipts and invoices can be lost.

• Finding particular transactions can be difficult.

• Errors may be harder to identify.

• It can be difficult to share records with your accountant.

Who is it suitable for?

Paper records may work for a very small business with only a handful of transactions. However, as your business grows, keeping everything organised manually can become increasingly difficult.

You can keep business records on paper, digitally or using software, provided they meet the relevant record-keeping requirements. You should also check whether any Making Tax Digital requirements apply to you.

2. Spreadsheet Bookkeeping

A spreadsheet is a popular option for sole traders, freelancers and small businesses that want a simple way to organise their finances.

You can use Microsoft Excel or Google Sheets to record transactions, calculate totals and organise expenses into categories.

For example, your spreadsheet might include the following columns:

Date	Description	Income	Expense	Category
05/06/2026	Client payment	£1,200	—	Sales
08/06/2026	Website subscription	—	£25	Software
12/06/2026	Office supplies	—	£40	Office costs
20/06/2026	Client payment	£850	—	Sales

You can use formulas to calculate total income, total expenses and the difference between the two.

Advantages

• Low cost, especially if you already have access to spreadsheet software.

• Easy to customise to your business.

• Useful for tracking income and expenses.

• Can provide a simple overview of your finances.

Disadvantages

• Transactions may need to be entered manually.

• Formula errors can affect your totals.

• You may need to spend extra time checking bank transactions against your records.

• Spreadsheets do not automatically provide all the features of accounting software.

Who is it suitable for?

Spreadsheets can be a practical starting point for freelancers and sole traders with relatively straightforward finances.

However, if your business is VAT registered or falls within Making Tax Digital requirements, you must ensure your record-keeping and submission arrangements meet the applicable rules. A spreadsheet on its own may not be sufficient.

3. Accounting Software

Accounting software allows you to record income and expenses electronically and organise your business finances in one place.

Popular options used by UK businesses include Xero, QuickBooks and FreeAgent.

Depending on the software and subscription, you may be able to:

• Connect your business bank account and import transactions.

• Match bank transactions to invoices and expenses.

• Create and send customer invoices.

• Record supplier bills.

• Track VAT.

• Monitor unpaid invoices.

• Generate profit and loss reports.

• Share records with your accountant.

Some software also supports payroll and other business processes.

Advantages

• Reduces repetitive data entry.

• Makes it easier to organise and search for transactions.

• Helps you monitor unpaid invoices and bills.

• Provides a clearer picture of your business finances.

• Can make preparing accounts and tax returns easier.

• May support Making Tax Digital requirements when the correct compatible software and setup are used.

Disadvantages

• Most packages have subscription costs, although some free options are available.

• You need time to learn how to use the software properly.

• Incorrect categorisation can still lead to inaccurate records.

• You need to keep an eye on transactions and investigate anything that does not look right.

Who is it suitable for?

Accounting software is often a good choice for growing businesses, VAT-registered businesses, landlords with several properties and business owners who want a clearer view of their finances.

It can also be useful if you want to spend less time on administration and more time running your business.

Before choosing a package, consider your budget, the features you need and whether the software supports the tax reporting requirements that apply to you.

Paper vs Spreadsheets vs Accounting Software: Which Is Best?

Feature	Paper records	Spreadsheets	Accounting software
Cost	Usually low	Low to moderate	Usually a subscription
Automatic calculations	No	Yes, with formulas	Usually
Bank transaction imports	No	Possible with extra steps	Often available
Invoice management	Manual	Basic	Often built in
Financial reports	Manual	Can be created	Usually built in
Best suited to	Very small operations	Simple finances	Growing or more complex businesses

For many small businesses, accounting software is the most convenient long-term option. However, the right choice depends on the number of transactions you handle, your budget and any legal reporting requirements.

What About Cash Basis and Traditional Accounting?

Choosing between paper, spreadsheets and software is not the same as choosing your accounting method.

Cash basis and traditional accounting determine when income and expenses are recorded for calculating taxable profit.

Cash Basis Accounting

Under cash basis accounting, you generally record income when you receive the money and expenses when you pay them.

For example, imagine you invoice a customer £1,000 in March but do not receive payment until April.

Under the cash basis, you generally record the £1,000 as income when you receive it in April.

This method can be simpler because it focuses on money actually received and paid.

For eligible sole traders and partnerships without corporate partners, cash basis accounting became the default method from the 2024–25 tax year. You can generally choose traditional accounting instead, subject to the relevant rules.

Read the GOV.UK guide to cash basis accounting for more information.

Traditional Accounting

Traditional accounting, also known as accruals accounting, records income when it is earned and expenses when they are incurred, rather than simply when money changes hands.

Using the same example, if you invoice a customer £1,000 in March, you generally record the income in March even if the customer pays in April.

This method can provide a fuller picture of your business's financial position because it takes account of unpaid invoices, outstanding bills and other adjustments.

It may be more suitable for businesses with more complex finances, significant stock or a need to provide traditional accounts for lenders.

Limited companies generally prepare their statutory accounts using accruals accounting, rather than the cash basis available to eligible unincorporated businesses.

For more details, see GOV.UK's guidance on business records.

Which Bookkeeping Method Is Best for Your Business?

The best method depends on how your business operates.

If You Are a Sole Trader or Freelancer

If you have a small number of transactions, a well-organised spreadsheet may be enough to get started, provided it meets your record-keeping and tax reporting obligations.

Accounting software may be a better option if you have regular customer invoices, several business expenses or want to keep a closer eye on unpaid bills.

You should also consider whether cash basis accounting suits your circumstances.

If You Run a Small Limited Company

Accounting software is often a practical choice because you may need to manage customer invoices, supplier bills, director transactions, payroll, VAT and year-end accounts.

Keeping business transactions separate from personal spending also makes your records easier to maintain and review.

Remember that limited companies have different accounting and reporting requirements from sole traders.

If You Are a Landlord

If you rent out property, you need to keep accurate records of rental income and relevant expenses.

These may include:

• Rental payments received.

• Letting agent fees.

• Repairs and maintenance.

• Insurance.

• Service charges.

• Other allowable property expenses.

A spreadsheet may be sufficient for a straightforward rental property, while accounting software can help if you manage several properties or have more complicated records.

Your accounting method and the tax treatment of expenses will depend on the applicable property income rules and your circumstances.

How to Set Up a Simple Bookkeeping System

Whatever method you choose, a few good habits can make managing your finances much easier.

1. Keep your records in one place.

Choose a system for storing invoices, receipts, bank statements and other financial documents. If you use digital records, organise them into clearly named folders or within your accounting software.

2. Record transactions regularly.

Set aside time each week or month to update your records. Leaving everything until the end of the tax year makes it easier to miss transactions and lose paperwork.

3. Categorise income and expenses.

Use clear categories such as sales, software, insurance, travel and office costs. This helps you understand where your money is coming from and where it is going.

4. Check your records against your bank statements.

Make sure your bookkeeping records agree with the transactions shown on your bank statements. Investigate missing transactions, duplicate entries and unexplained differences.

5. Keep evidence of your transactions.

Save invoices, receipts and other supporting documents. These help you verify your records and support your figures if HMRC asks to check them.

6. Review your finances regularly.

Look at your income, expenses, unpaid invoices and upcoming payments. Regular reviews can help you identify problems early and make better business decisions.

You can find more information about the records you need to keep in the official GOV.UK guide for self-employed people.

Don't Forget Making Tax Digital

Making Tax Digital (MTD) is changing how certain businesses and landlords maintain their tax records and report income to HMRC.

From April 2026, qualifying sole traders and landlords with combined qualifying gross income from self-employment and property above £50,000 are required to use Making Tax Digital for Income Tax, subject to the applicable rules. The threshold reduces to above £30,000 from April 2027 and above £20,000 from April 2028.

If you may be affected, it is worth reviewing your bookkeeping system now and checking whether you need compatible software.

You can read the latest requirements on GOV.UK's Making Tax Digital for Income Tax guidance.

Common Bookkeeping Mistakes to Avoid

Even with a good system, some common mistakes can make managing your finances harder.

• Leaving bookkeeping until the last minute: Regular updates help prevent a backlog.

• Mixing personal and business transactions: Separate accounts can make your records easier to understand.

• Forgetting small expenses: Keep receipts and record transactions as you go.

• Failing to check bank transactions: Imported transactions still need to be reviewed and categorised correctly.

• Choosing software without checking your needs: Make sure it supports your business activities and relevant reporting requirements.

• Assuming every expense is tax-deductible: An expense must meet the relevant tax rules before you can claim it.

Remember, good bookkeeping is not just about recording figures. It is about keeping reliable information that helps you understand your business and meet your responsibilities.

Final Thoughts: Keep Your Bookkeeping Simple

So, what is the best bookkeeping method for small businesses?

For a business with very few transactions, a spreadsheet may be a sensible starting point. For a growing business, accounting software can save time and make it easier to manage invoices, expenses and financial reports. Paper records may still have a role, but they can become harder to manage as your business grows.

You should also consider whether cash basis or traditional accounting is appropriate for your business, as these affect how income and expenses are recorded for tax purposes.

The most important thing is to choose a system you can maintain consistently, keep accurate records and review your finances regularly.

At DUO Accountants, we know that bookkeeping can feel overwhelming when you are already busy running a business. Our aim is to make accounting straightforward, so you can spend less time worrying about the numbers and more time focusing on what you do best.

Need Help with Your Bookkeeping?

Whether you are a sole trader, landlord or small business owner, DUO Accountants can help you understand your bookkeeping options and find a practical approach for your business.

Book your discovery call now!