What is Consistency Principle?
The consistency principle is a fundamental accounting concept requiring a business to apply the same accounting policies, methods, and procedures from one period to the next, so that financial statements remain comparable across periods.
How It Works
- Same depreciation, inventory, and revenue recognition methods each year.
- Changes only allowed when required by a new standard or to provide more reliable information.
- Change in accounting policy applied retrospectively (IAS 8).
- Change in accounting estimate applied prospectively.
Saudi Context
Saudi auditors and ZATCA inspectors expect Saudi businesses to apply consistent accounting policies across reporting periods. Any change in policy must be disclosed prominently in the notes with the rationale and quantitative impact, and ZATCA may challenge changes that primarily reduce taxable income or zakat base.
Example
A Saudi retailer using FIFO inventory costing for 5 years cannot switch to weighted average in year 6 without disclosing the change, restating prior-year comparatives, and justifying why the new method provides more reliable information.