Service Business Accounting — Full Year Walkthrough (Freelancer / Agency)

What this tutorial actually shows

This is not theory.

This is a full simulation of a real service business using DII Accounts over a 12-month period.

You will follow:

  •  a freelancer / agency setup 
  •  first client and first invoice 
  •  real money movement 
  •  expenses and cost tracking 
  •  bank reconciliation 
  •  VAT registration and reporting 
  •  monthly control and year-end clarity 
By the end, you will understand not just how to click buttons — but how a business actually operates financially.

PART 0 — BEFORE YOU START (CRITICAL CONTEXT)

Most founders do not fail because of bad ideas.

They fail because they never build a proper operational structure.

They:

  •  send invoices without tracking payments 
  •  mix personal and business money 
  •  forget expenses 
  •  misunderstand VAT 
  •  rely on memory instead of systems 
This works for a few weeks.

Then it breaks.

What this system is for

DII Accounts is not just accounting software.

It is your financial operating system.

It allows you to:

  •  structure your business properly 
  •  track every financial movement 
  •  understand performance in real time 
  •  stay compliant without chaos 

What you are about to build

Over this tutorial, you will build:

  •  a structured business workspace 
  •  a clean revenue flow 
  •  traceable expenses 
  •  reconciled bank data 
  •  VAT tracking 
  •  financial reports 
This becomes your business evidence system.

PART 1 — DAY 0: BUILDING YOUR FOUNDATION

Goal

Create a clean, scalable structure before money starts flowing.

Step 1 — Create Workspace

After signup, you land inside your workspace.

This is your:

  •  company container 
  •  financial environment 
  •  system of record 
Everything will live here:

  •  customers 
  •  invoices 
  •  payments 
  •  VAT 
  •  reports 

Why this matters

Without structure:

  •  data becomes fragmented 
  •  reporting becomes unreliable 
  •  tax becomes risky 
With structure:

  •  everything connects 
  •  everything is traceable 
  •  everything scales 

Step 2 — Understand Your Dashboard

At the beginning:

  •  revenue = £0 
  •  no customers 
  •  no transactions 
This is correct.

You are starting clean.

Mistake to avoid

Do not wait until you “have business” to use the system.

You build structure first — then activity flows into it.

PART 2 — MONTH 1: FIRST CLIENT & FIRST MONEY

Scenario

You are a freelancer providing services.

You complete your first project.

You charge:

👉 £900

Step 1 — Create Customer

Go to:

Sales → Contacts → New

Create:

  •  Name: Alpha Client Ltd 
  •  Type: Customer 
  •  Currency: GBP 

Why this matters

The customer must exist before:

  •  invoices 
  •  payments 
  •  reporting 
Without this:

  •  revenue cannot be tracked properly 

Step 2 — Create Invoice

Go to:

Sales → Invoices → New

Fill:

  •  Customer: Alpha Client Ltd 
  •  Amount: £900 
  •  VAT: none 

Important concept

At this moment:

👉 You earned revenue
 ❗ You did NOT receive cash

Step 3 — Record Payment

Client pays.

Go to:

Sales → Payments → New

  •  Amount: £900 
Then match payment → invoice

Result

  •  Invoice = Paid 
  •  Cash = received 
  •  Revenue = recorded 

Mistake to avoid

Do NOT assume:

“Invoice = money”

Until payment is recorded:

👉 it is only expected income

PART 3 — EXPENSES (MONTH 1)

Scenario

You pay:

  •  £120 → software 
  •  £50 → tools 

Step — Record Expenses

Go to:

Purchases → Expenses → New

Record each cost.

Why this matters

Expenses affect:

  •  profit 
  •  tax 
  •  VAT (later) 

Mistake to avoid

If you do not record expenses:

👉 your profit becomes fake

PART 4 — BANK + RECONCILIATION

Scenario

You import your bank statement.

Transactions:

  •  +£900 (client payment) 
  •  -£120 (software) 
  •  -£50 (tools) 

Step 1 — Add Bank Account

Banking → Bank Accounts

Step 2 — Import Transactions

Upload CSV

Step 3 — Reconcile

Match:

  •  payment → invoice 
  •  expenses → records 

Result

Your system becomes:

  •  accurate 
  •  verified 
  •  trustworthy 

Why this matters

Without reconciliation:

❌ data is unreliable

With reconciliation:

✅ system becomes source of truth

PART 5 — MONTH 6: VAT REGISTRATION

Scenario

Your business grows.

You register for VAT.

Step 1 — Enable VAT

VAT Workflow → Settings

Add:

  •  VAT number 
  •  Scheme: Standard 
  •  Frequency: Quarterly 

Step 2 — Invoice with VAT

Now charge:

£1,000 + VAT

  •  VAT: £200 
  •  Total: £1,200 

What changes

System now tracks:

  •  VAT collected (sales) 
  •  VAT reclaimable (expenses) 

Example

Over period:

  •  VAT collected: £3,000 
  •  VAT reclaim: £1,200 
👉 VAT payable: £1,800

PART 6 — REPORTS

Go to:

Reports → Profit & Loss

What you see

  •  revenue 
  •  expenses 
  •  profit 

Critical concept

👉 Profit ≠ Cash

Example

  •  invoice issued → profit 
  •  not paid → no cash 

PART 7 — PERIOD CONTROL

Go to:

Accounting Periods

What you do

  •  review month 
  •  close period 

Why

Prevents:

  •  editing history 
  •  data corruption 

PART 8 — AUDIT TRAIL

Go to:

Admin → Audit Trail

What you see

  •  invoice created 
  •  payment recorded 
  •  expense added 

Why this matters

Required for:

  •  accountants 
  •  HMRC 
  •  IFV evidence 

PART 9 — YEAR SUMMARY

After 12 months:

Example:

  •  Revenue: £60,000 
  •  Expenses: £20,000 
  •  Profit: £40,000 
  •  VAT paid: £8,000 

WHAT YOU HAVE BUILT

This is not just accounting.

You built:

  •  a financial system 
  •  a reporting engine 
  •  a compliance structure 
  •  a business evidence record 

FINAL INSIGHT

Most founders try to understand accounting at the end.

Successful founders structure it at the beginning.