Messaging-Based Bookkeeping: How Accounted Works

Your Bookkeeping App Is Already on Your Phone

You probably have a bookkeeping app installed right now. Maybe it's Xero, maybe QuickBooks, maybe FreeAgent. And if you're like most sole traders, you opened it enthusiastically in the first week, categorised a few transactions, and then... didn't go back for six weeks.

It's not your fault. Traditional bookkeeping apps require you to actively decide to open them, log in, navigate to the right screen, and process transactions. Each step is a tiny friction point, and those friction points add up to complete avoidance.

Accounted takes a radically different approach. Instead of asking you to come to the software, we bring the software to you -- inside WhatsApp, the app you already check dozens of times a day. Your AI bookkeeper Penny lives in your WhatsApp conversations, and she handles your books through the same chat interface you use for everything else.

Here's exactly how it works, from sign-up to your first HMRC submission.

Step 1: Sign Up and Connect

Getting started takes about two minutes:

1. Create your account at accounted.app/signup. You'll need your name, email, and phone number.
2. Connect your bank through Open Banking. Accounted uses TrueLayer, an FCA-regulated provider, to connect securely to your bank. You authenticate directly with your bank -- we never see your login details.
3. Link your WhatsApp number. You'll receive a verification message from Penny to confirm the connection.

That's it. No software to download, no desktop app to install, no complex onboarding wizard. Penny has access to your bank transactions and a way to reach you on WhatsApp. She's ready to start.

Step 2: Penny Processes Your Transactions

Once connected, Penny begins processing your bank transactions. She analyses each one using Accounted's three-tier reasoning engine, considering the merchant name, amount, timing, your industry, and (once she has enough data) your personal spending patterns.

For each transaction, she assigns an HMRC expense category and a confidence score:

• 95%+ confidence: Categorised automatically. Your monthly phone bill, regular fuel purchases, subscription payments -- these are handled without bothering you.
• 70-94% confidence: Flagged for a quick check via WhatsApp. Penny suggests her best answer and asks you to confirm.
• Below 70% confidence: Penny asks you directly rather than guessing.

In practice, about 80-85% of your transactions are processed automatically from day one. That percentage increases over time as Penny learns your patterns.

Step 3: The Daily Conversation

This is where Accounted feels genuinely different from any other bookkeeping tool. Rather than a dashboard you need to visit, Penny sends you messages on WhatsApp -- just like a real bookkeeper would.

Transaction Queries

Penny: Hi! I've got one transaction I need your help with today.

£89.00 to AMAZON.CO.UK on 26 Feb -- is this:

1. Office supplies
2. Stock for resale
3. Personal (not business)
4. Something else?

You: 1

Penny: Done -- categorised as Office supplies. All 12 transactions from this week are now sorted.

Receipt Capture

You: [Sends photo of a Costa receipt]

Penny: Got it! I can see:

• Merchant: Costa Coffee
• Date: 27 February 2026
• Total: £8.90

I've matched this to your card transaction and categorised it as "Business entertaining." Receipt stored.

Tax Questions

You: Can I claim my new laptop as an expense?

Penny: Yes, if you use it for business. If it's exclusively for business use, you can claim the full cost. If you use it for both business and personal, you'll need to claim the business proportion only. For a laptop costing, say, £800 with 80% business use, that's £640 as an allowable expense. Shall I categorise your recent laptop purchase?

Voice Notes

On a job and can't type? Send Penny a voice note: "That last Toolstation purchase was materials for the Henderson kitchen refit." She transcribes it, attaches the context to the transaction, and carries on.

Step 4: Receipt Management

Lost receipts are one of the biggest headaches in sole trader bookkeeping. HMRC requires you to keep records for at least five years after the 31 January submission deadline of the relevant tax year.

With Accounted, receipt management becomes effortless:

1. Buy something for your business
2. Photograph the receipt on your phone
3. Send it to Penny on WhatsApp
4. Done -- Penny extracts all the data, matches it to the bank transaction, and stores the digital copy

No separate receipt scanning app. No manual data entry. No shoeboxes. Every receipt is digitally stored, searchable, and linked to the correct transaction.

Penny's OCR (optical character recognition) extracts:

• Merchant name and address
• Date and time
• Individual line items
• Subtotal, VAT amount, and total
• Payment method

For more detail on how receipt scanning works, read our complete receipt scanning guide.

Step 5: Tax Position Updates

One of the most common sources of stress for sole traders is not knowing how much tax they owe until the deadline arrives. With Accounted, that uncertainty disappears.

Ask Penny at any point:

You: What's my tax bill looking like?

Penny: Here's your estimated position for 2025/26 (based on transactions to 28 February):

• Gross income: £38,420
• Allowable expenses: £11,890
• Taxable profit: £26,530
• Estimated income tax: £2,806
• Estimated Class 2 NIC: £179
• Estimated Class 4 NIC: £1,076
• Total estimated liability: £4,061
• Payments on account already made: £2,400
• Estimated balance due 31 Jan 2027: £1,661

This is a real-time calculation based on your actual transactions, not a rough estimate. It updates every time a new transaction is processed.

Step 6: Making Tax Digital Submissions

When it's time for a quarterly MTD update, Penny handles the entire process:

1. Penny prepares the submission based on your categorised transactions
2. She sends you a summary via WhatsApp for review
3. You confirm with a single message
4. Penny submits directly to HMRC through the official API
5. You receive confirmation once HMRC accepts the submission

No logging in to HMRC. No navigating complex government websites. No downloading separate MTD bridging software. Read our full MTD compliance guide for the details.

What Makes This Different from a Chatbot

You might be thinking: "This sounds like a chatbot with accounting features bolted on." It's not. The distinction matters.

A chatbot responds to your questions. Penny proactively manages your books. She:

• Initiates conversations when transactions need attention
• Follows up if you haven't responded to something important
• Reminds you about upcoming deadlines
• Spots anomalies like duplicate transactions or unusual spending
• Maintains context across conversations -- she remembers what you discussed last week

Penny is an autonomous bookkeeper who communicates through WhatsApp, not a chat interface layered over a traditional app. The WhatsApp conversation isn't an add-on to the product. It is the product.

Security and Privacy

Handling financial data through WhatsApp raises fair questions about security. We've thought deeply about this.

• Official WhatsApp Business API via Twilio -- not unofficial tools or workarounds
• End-to-end encryption on all WhatsApp messages by default
• TLS 1.3 for all data transmitted to our servers
• AES-256 encryption at rest for all financial data
• FCA-regulated Open Banking -- we never see your bank credentials
• UK GDPR compliant -- your data is never sold or shared

Read our comprehensive security guide for the full picture.

Who Is WhatsApp Bookkeeping Best For?

Accounted is designed for UK sole traders and freelancers, particularly:

• Tradespeople who are on site all day and can't sit at a computer
• Freelancers juggling multiple clients and irregular income
• Side-hustlers who need bookkeeping that takes minutes, not hours
• Landlords tracking rental income and expenses
• Anyone who has tried traditional bookkeeping software and given up

If you want to see how Accounted stacks up against traditional tools, read our comparison with Xero.

Get Started Today

Sign up takes two minutes. The 14-day free trial requires no credit card. Penny will start categorising your transactions from day one.

See our plans and pricing or sign up now to meet Penny.