Switching From Cash to Accrual Accounting
Cash accounting is simple: money in, money out. But as your business grows, it can hide what is really happening, especially when clients pay late or you buy in bulk. Switching from cash to accrual accounting gives you a truer picture of profit, and the start of a new financial year is the cleanest moment to do it. Here is how to decide, what the rules say, and how to make the change without chaos.
Key takeaways
- Cash accounting records income and expenses when money moves. Accrual accounting records them when they are earned or incurred.
- Accrual gives a truer view of profit when you invoice on credit, hold inventory or sign contracts that span months.
- In the US, larger businesses above the gross receipts test generally must use accrual, and changing method usually needs IRS Form 3115.
- In the UK, the cash basis has been the default for sole traders and partnerships since April 2024, so moving to accrual is an active choice.
- A clean switch starts with an opening balance sheet: receivables, payables, prepayments and deferred income on day one.
Most small businesses start on the cash method because it matches how owners think. You see money arrive in the bank, you count it as income. You pay a bill, you count it as an expense. For a freelancer paid on the spot, that works perfectly well.
Trouble starts when the timing of cash and the timing of work drift apart. You finish a big project in December but the client pays in February. You pay for a year of software in January. You buy three months of stock in one go. On the cash method, your monthly profit swings wildly, and it becomes hard to tell a good month from a lucky one. That is when owners start asking about accrual.
A quick note: this is general information, not tax or accounting advice. The rules on accounting methods depend on your business structure, size and country, so work with a qualified accountant before you change how you file.
Cash vs accrual: the core difference
Both methods record the same transactions eventually. The difference is timing.
| Cash method | Accrual method | |
|---|---|---|
| Income recorded | When the customer pays | When you earn it, usually when you deliver or invoice |
| Expenses recorded | When you pay the bill | When you incur the cost, even if you pay later |
| Unpaid invoices | Not in your profit yet | Counted as income and tracked as receivables |
| Unpaid bills | Not in your costs yet | Counted as expenses and tracked as payables |
| Best for | Simple, small, pay-on-the-spot businesses | Credit sales, inventory, contracts, investors and lenders |
Think of cash accounting as a bank statement with labels, and accrual accounting as a story of what the business actually did in each period. Both are useful. The question is which one tells you the truth you need.
Signs it is time to switch
You do not need accrual just because it sounds more grown-up. But these signals suggest the cash method is no longer serving you well:
- You invoice on terms. If clients pay 30 or 60 days after the work, your cash profit lags your real performance.
- You hold inventory. Buying stock in bulk makes cash-basis profit look terrible in the month you buy and great in the months you sell.
- You sell annual plans or retainers. Upfront payments make one month look huge, even though you still owe the work for the rest of the year.
- You are talking to lenders or investors. Banks and investors usually expect accrual-based statements because they compare more easily.
- Your monthly reports confuse you. If you regularly say "this month looks bad, but it is really just timing," your method is hiding the signal.
- You are approaching legal thresholds. Growth may make accrual a requirement rather than a choice.
Pro tip
You can run accrual-style management reports even if you file taxes on the cash basis. Many accounting tools let you toggle reports between cash and accrual views. Try that for a few months first. If the accrual view is the one you keep checking, that is your answer.
The rules in the US and the UK
Your accounting method for tax purposes is not purely a matter of taste. Both countries set rules on who can use which method and how to change.
United States
Many small businesses can choose the cash method, but businesses above the gross receipts test generally must use accrual. For 2025, that threshold was about $31 million in average annual gross receipts, and it is indexed for inflation, so check the current figure. Businesses with inventory and certain entity types may face extra rules, too.
Changing your tax accounting method usually requires filing IRS Form 3115, Application for Change in Accounting Method. Some changes qualify for an automatic procedure, while others need IRS consent. The switch also creates a one-time adjustment, because income and expenses that fell between the methods have to be accounted for so nothing is counted twice or missed. The IRS has rules on how that adjustment is spread, and this is exactly where an accountant earns their fee.
United Kingdom
Since April 2024, the cash basis has been the default for sole traders and partnerships in Self Assessment. That means if you want to use traditional accrual accounting for tax, you generally need to opt out of the cash basis on your return. Limited companies prepare accounts on an accruals basis anyway, so this choice mostly affects the self-employed and partnerships.
Moving between the cash basis and accruals can also trigger transitional adjustments. HMRC publishes guidance on how these work. Check the current rules, and talk to your accountant before your next Self Assessment return, which for most people is due online by 31 January.
Common mistake
Changing the method in your software and assuming the tax side follows. Your bookkeeping view and your tax filing method are related but separate decisions. Flip a report setting and you change what you see. Changing what you file usually needs a formal election or form.
How to make the switch step by step
The cleanest switch happens at the start of a financial year. If your year runs January to December, you have November and December to prepare, which is ideal. Here is the process most accountants follow.
- Agree the decision with your accountant. Confirm whether you are changing only your management reports or your tax method too, and which forms or elections are needed.
- Pick a switch date. The first day of your next financial year is usually best, because it keeps the comparison periods clean.
- List unpaid customer invoices. Everything you have billed but not yet collected becomes your opening accounts receivable.
- List unpaid supplier bills. Everything you owe for goods and services already received becomes your opening accounts payable.
- Find prepayments. Costs you paid in advance, such as annual insurance or software, are spread over the months they cover.
- Find deferred income. Money customers paid in advance for work you have not yet done is a liability until you deliver.
- Count inventory. If you hold stock, you need an opening value on the switch date.
- Post opening balances. Enter these figures in your accounting software as of the switch date, then reconcile your bank accounts to make sure nothing is double-counted.
- Update your habits. From day one, record invoices when you issue them and bills when you receive them, not when cash moves.
An opening balance worksheet template
Before you post anything, gather your opening figures in one place. This worksheet keeps the switch organized and gives your accountant everything in one view.
| Item | Type | Counterparty | Original date | Amount | Period it relates to | Opening balance treatment |
|---|---|---|---|---|---|---|
| Invoice 1042 | Receivable | Example client A | 15 Dec | $4,800 (example) | December project | Opening accounts receivable |
| Annual insurance | Prepayment | Example insurer | 1 Oct | $1,200 (example) | Oct to Sep | 9 months remaining as prepayment |
| Retainer paid upfront | Deferred income | Example client B | 20 Dec | $3,000 (example) | Jan to Mar | Liability until work is delivered |
Add one row per open item. If a list gets long, sort it by type so receivables, payables, prepayments and deferred income sit together and can be totaled.
Example
Imagine Leo, who runs a design studio on annual retainers. In December, two clients paid $6,000 each for the full year ahead. On the cash method, December looks like a record month and January through November look thin. After switching to accrual, each $6,000 is spread across the twelve months of work, so $500 per client lands in each month. His reports finally show a steady, profitable business, which is exactly what his bank wanted to see when he asked about a loan. (These numbers are made up for illustration.)
What changes after the switch
Accrual takes a little more discipline, but it rewards you with much clearer information. Expect these changes:
Your monthly close gets a few extra steps
Each month you will review open invoices, record bills you have received but not paid, and post adjustments for prepayments and deferred income. Many accounting tools can automate recurring adjustments once you set them up.
You need to watch cash separately
Here is the catch: on accrual, profit and cash are no longer the same number. You can be profitable on paper while your bank balance shrinks because clients pay slowly. Keep a simple cash forecast alongside your accrual reports, and keep a close eye on your receivables.
Your tax timing may shift
On accrual, you may owe tax on income you have invoiced but not yet collected. Plan for that with your accountant, especially if you have large invoices outstanding at year-end. In the US, keep the Q4 estimated tax deadline of 18 January 2028 in mind as you plan.
Common mistake
Counting the same income twice. A client invoice from December that you record as opening receivables should not be recorded as new income again when the payment arrives in January. When the cash comes in, it clears the receivable. It is not fresh revenue.
Your cash-to-accrual action plan
- Run accrual-view reports for a few months to see the difference
- Book a call with your accountant to confirm the tax side
- Choose a switch date, ideally the first day of your next financial year
- List every unpaid invoice, unpaid bill, prepayment and deferred income item
- Count and value inventory if you hold stock
- Post opening balances and reconcile your bank accounts
- Set up recurring monthly adjustments in your accounting software
- Start a simple cash forecast to run alongside your accrual reports
Frequently asked questions
Can I use accrual for reports and cash for taxes?
Often, yes. Many small businesses keep management reports on an accrual view while filing taxes on the cash method where they are allowed to. Your accountant can confirm whether that works for your situation and how to reconcile the two.
Is accrual accounting harder to keep up?
It takes a bit more routine: recording bills when they arrive and making a few month-end adjustments. Modern accounting software handles most of the heavy lifting, so for many owners the extra work is under an hour a month.
Can I switch back to cash later?
Sometimes, but it is not a casual decision. Tax authorities generally limit how often and how you can change methods, and some businesses must stay on accrual once they cross certain thresholds. Treat the switch as long-term.
Related reading
The bottom line
Switching from cash to accrual accounting is less about rules and more about seeing your business clearly. If you invoice on terms, hold stock, sell annual plans or talk to lenders, accrual will likely tell you a truer story. Check the US and UK rules with your accountant, pick a clean switch date, build an opening balance worksheet and keep a cash forecast running alongside.
Use November and December to gather your opening figures, and you can start the new year with books that finally match the way your business really works.
