GAAP Principles
Generally Accepted Accounting Principles. The rulebook that ensures all companies use the same scale—and protects everyone who relies on financial statements.
Why This Matters
Imagine every company prepared financial statements differently:
• Company A records revenue when contracts are signed
• Company B records revenue when work is completed
• Company C records revenue when payment is received
An investor comparing the three gets meaningless data. It's like comparing temperatures in Celsius to Fahrenheit—different scales, impossible comparison.
GAAP is the rulebook that ensures all companies use the same scale.
Without GAAP, financial statements would be chaos. With GAAP, investors can compare Apple to Microsoft, banks can assess loan risk, and markets function.
What Is GAAP?
GAAP
= Generally Accepted Accounting Principles
The standardized rules and procedures that accountants must follow when preparing financial statements.
Who sets GAAP?
- US: FASB (Financial Accounting Standards Board)
- International: IASB → IFRS
- Enforced by: SEC for public companies
Why it exists:
Without GAAP, every company would have its own rules, and financial statements would be incomparable and unreliable.
GAAP doesn't exist to constrain accountants. It exists to protect everyone who relies on financial statements.
The Foundation: Four Assumptions
Before the principles, GAAP starts with four fundamental assumptions:
The Framework: Two Constraints
Before applying principles, GAAP also recognizes two constraints:
Materiality
Only matters if it's significant enough to affect decisions.
Company buys staplers for $50 → Expense immediately (immaterial)
Company buys building for $5M → Capitalize as asset (material)
Implication: Professional judgment about what matters.
Cost-Benefit
The cost of accounting shouldn't exceed the benefit to users.
✗ Tracking every pencil used (benefit: minimal, cost: high)
✓ Tracking total office supplies expense (benefit: significant, cost: low)
Implication: Accounting must be practical, not perfectionist.
The 10 Core Principles
How the Principles Work Together
The 10 principles aren't independent—they work as a system:
Result: Comparable, reliable financial statements
Why Each Principle Exists: Fraud Prevention
| Principle | Fraud Risk | How It Prevents |
|---|---|---|
| Business Entity | Owner using company assets personally | Separate personal from business |
| Cost | Inflating asset values | Record at cost, not guessed value |
| Revenue Recognition | Recording sales too early | Record only when earned |
| Matching | Mismatching revenues/costs | Match to same period |
| Full Disclosure | Hiding problems | Require transparency |
| Objectivity | Subjective manipulations | Use verifiable facts |
| Consistency | Changing methods to manipulate | Use same method always |
| Conservatism | Optimistic overstatement | Record lower profit when uncertain |
GAAP vs. IFRS: The Global Difference
The US uses GAAP. Most of the world uses IFRS (International Financial Reporting Standards).
GAAP (Rules-Based)
- ✓ Specific, detailed, less ambiguity
- ✗ Can be gamed (follows letter, not spirit)
IFRS (Principles-Based)
- ✓ Flexible, emphasizes substance over form
- ✗ Requires more judgment, less comparable
Reality: Both are legitimate. Choice depends on jurisdiction. IFRS used in 140+ countries.
Who Enforces GAAP?
FASB
Sets the standards
Issues Accounting Standards Codification (ASC)
SEC
Enforces compliance
Requires public companies to use GAAP
AICPA
Professional standards
Enforces ethical standards for CPAs
Real-World: How GAAP Prevents Fraud
Key Takeaway
GAAP (Generally Accepted Accounting Principles) is the standardized framework that ensures all companies prepare financial statements using the same rules. Built on four assumptions, constrained by materiality and cost-benefit considerations, and governed by ten core principles, GAAP creates comparable, reliable financial statements. Each principle addresses a specific fraud risk and ensures that financial statements reflect economic reality fairly.
Test Your Understanding
Which assumption states that a business will continue operating in the foreseeable future?
The Cost Principle states that assets should be recorded at:
Which principle requires disclosing all information important to financial statement users?
The Matching Principle is violated when:
True or False: GAAP allows companies to switch between accounting methods each year to show better results.
Ready to Practice?
You now understand the authoritative framework that governs all accounting. Apply GAAP principles to complex scenarios and identify principle violations.
Try the Practice Lab