Accounting — From Evidence to Decisions
Accounting is not a list of rules. It is a disciplined answer to six questions:
These study notes follow that chain. Read them to understand how the concepts fit together, return to a worked example when a calculation is unclear, and use the further reading to explore a question in more depth. Examples make the reasoning visible; their assumptions also show where a conclusion stops applying.
The running case: Northstar Cycles
Northstar Cycles Ltd. is a fictional UK e-bike business. It:
- buys components and manufactures two bicycle models;
- sells bikes on cash and credit terms;
- bundles bikes with maintenance plans;
- develops a customer app;
- leases a warehouse and owns production equipment;
- prepares external reports under an IFRS teaching baseline;
- uses budgets, cost models and investment appraisal internally.
All Northstar amounts are in pounds sterling. Tax rates and discount rates are labelled as assumptions. Real-company examples are explicitly identified and never mixed into the fictional dataset.
What you should be able to do
By the end, you should be able to:
- translate a business event into balanced journal entries;
- explain why profit, cash and value are different;
- apply introductory recognition and measurement logic to revenue, inventory, receivables, long-lived assets, leases and tax;
- connect an adjusted trial balance to the four primary statements;
- calculate ratios and explain their operational drivers without relying on universal thresholds;
- use relevant costs, budgets, performance measures and discounted cash flows to support a decision;
- identify where IFRS, US GAAP, estimates or management-defined measures limit comparability;
- leave an audit trail from conclusion back to evidence and assumptions.
Before you begin
You need percentages, simple algebra and present-value arithmetic. You do not need prior accounting.
For an overview, use Financial and Management Accounting Foundations. It connects the main ideas through summaries, a complete adjustments-to-statements example, a monthly cash budget and decision comparisons. Follow the links into the topic chapters wherever you need a fuller derivation or explanation.
Use these examples to check your starting point:
| Event | First conclusion | Why |
|---|---|---|
| A customer pays £2,400 now for two years of future service. | Cash rises; revenue may not yet be earned. | Payment and performance occur at different times. |
| Equipment is bought for £60,000 cash. | One asset replaces another initially. | Depreciation, not the whole payment, normally enters profit over use. |
| Reported profit rises while receivables and inventory rise faster. | Investigate cash conversion. | Growth may consume rather than release cash. |
| A special-order price is below full unit cost. | Do not reject it yet. | Unavoidable fixed allocations may be irrelevant when capacity is idle. |
If any answer feels surprising, start at Financial Accounting. If all four are comfortable, use the chapter checks to move faster.
Course route
| Unit | Question | Main output |
|---|---|---|
| 1. Reporting foundations | What makes a number useful and supportable? | Event and element analysis |
| 2. Recording transactions | How does evidence enter the ledger? | Journal, ledger and trial balance |
| 3. Revenue | What has the entity actually delivered? | Contract allocation and entry |
| 4. Inventory and receivables | What amount is recoverable? | Cost-flow and loss estimates |
| 5. Long-lived assets, leases and tax | Which costs belong now and later? | Carrying amounts and adjustments |
| 6. Statements and cash | How do the records become reports? | Linked statements and reconciliation |
| 7. Analysis and comparison | What story do the reports support? | Ratio tree and policy caveats |
| 8. Cost foundations | What causes cost? | Cost model and product cost |
| 9. CVP and budgets | What should happen at a chosen activity level? | Scenario and flexible budget |
| 10. Control and performance | Did results improve for the right reason? | Variance and KPI diagnosis |
| 11. Short-term decisions | Which future cash flows differ? | Incremental decision table |
| 12. Capital investment | Does the project create value? | NPV and sensitivity analysis |
| Capstone | Can you defend the whole chain? | Record-to-report-to-decision memo |
A repeatable study method
On a first reading, identify the question, the central relationship and the assumptions behind it. Follow a worked example and explain why each step is needed. On a later reading, cover the solution, reproduce the reasoning and change one assumption to see which conclusions survive.
Keep a short note of the distinction that matters most: cash versus profit, a balance versus a movement, or a total cost versus a relevant cost. Use the linked topic pages to pursue that distinction beyond the example. Exercises are opportunities to check understanding; you can revisit them whenever you need them.
Screen-reader users can rely on the tables and text explanations; charts are supplementary. Interactive cells are optional and have worked static examples beside them.
Three boundaries that prevent weak answers
1. Bookkeeping is not recognition
A balanced entry can still represent the wrong event or period. First decide what happened; then decide how to record it.
2. Standards are not estimates
A standard may require an expected-loss estimate, but it does not supply Northstar’s probability or forecast. State the rule, the evidence and the estimate separately.
3. Accounting is not valuation
Financial statements provide inputs to decisions. They do not automatically equal market value, replacement value or project value.
Evidence hierarchy
This course uses sources in the following order:
- IFRS Foundation and FASB material for reporting requirements and current projects;
- regulator filings and company annual reports for real disclosures;
- peer-reviewed research for explanatory and empirical insight;
- clearly labelled working papers for emerging questions.
The reading and evidence map records why each source is included. It is a selective teaching map, not a systematic or PRISMA review.
Current reporting window
The course was source-checked on 1 August 2026.
- IFRS 18 replaces IAS 1 for annual periods beginning on or after 1 January 2027; future-effective content is labelled.
- The IASB concluded in July 2026 that IFRS 16 is overall working as intended, while identifying targeted cost and application work.
- The IASB is actively reviewing IAS 38 and newer forms of intangibles.
- FASB’s expense-disaggregation update applies to US public business entities from specified periods beginning after 15 December 2026.
- Structured reports matter: the IFRS Foundation says the 2025 Accounting Taxonomy remains current for 2026 reporting.
These developments change presentation, disclosure and data use; they do not remove the need to understand the underlying event and entry.
Choose your next page
- New to accounting: Objectives and qualitative characteristics
- Comfortable with statements, learning internal decisions: Management Accounting
- Revising or checking terminology: Accounting Appendix
- Ready to integrate: Northstar capstone