What is Trend Analysis?
Trend analysis compares a company's financial data across multiple periods to identify patterns of growth, decline, or stability. By setting an early year as the base period and expressing later years as a percentage of it, analysts can see whether revenue, expenses, or profits are moving in a favorable direction. It's the foundation of comparative (horizontal) financial statement analysis.
Trend analysis expresses each period's financial figure as a percentage of a base-year figure using Trend % = (Current Year Value ÷ Base Year Value) × 100, revealing growth or decline over time.
Try it: interactive calculator
Step-by-step worked examples
Revenue was $100,000 in the base year (2021) and $132,000 in 2025. Find the trend percentage.
Trend % = (Current ÷ Base) × 100 Trend % = (132,000 ÷ 100,000) × 100 Trend % = 132%, meaning revenue grew 32% since the base year
Operating expenses were $50,000 in the base year and $45,000 two years later. What does the trend percentage show?
Trend % = (45,000 ÷ 50,000) × 100 Trend % = 90% Expenses fell to 90% of the base year, a 10% decrease — generally favorable if revenue held steady
A company's net income trend line reads: Year 1 = 100%, Year 2 = 115%, Year 3 = 95%. What does this indicate?
Year 1 to Year 2: net income grew 15% versus the base year Year 2 to Year 3: net income fell from 115% to 95%, a decline versus both prior years The trend shows growth followed by a downturn, prompting further investigation into the Year 3 drop
Flashcards
Quick quiz
Q1.Base year revenue = $80,000, current year = $100,000. Trend %?
Q2.A trend percentage below 100% means the value:
Q3.Trend analysis is also known as:
Q4.Why is a stable, representative base year important?
The full card deck, worked steps and AI-tutor support for “What is Trend Analysis?” are in Notek — study by hand before your exam.
Common mistakes
Any year can be used as the base year without consequence. — Correct: Pick a normal, representative year — an outlier base year distorts every later comparison.
Trend analysis and ratio analysis are the same thing. — Correct: Trend analysis compares one line item over time; ratio analysis compares two figures within a period.
A rising trend percentage is always good. — Correct: Rising expenses or debt trending upward is unfavorable — context and the specific line item matter.
Trend analysis only works with revenue. — Correct: It can be applied to any financial statement line item — expenses, assets, net income, and more.
FAQ
What is trend analysis in accounting?
It's a technique that compares a financial line item across multiple periods, expressed as a percentage of a base year, to spot growth or decline.
What is the trend analysis formula?
Trend % = (Current Year Value ÷ Base Year Value) × 100.
How do you calculate trend analysis with an example?
If base year revenue is $100,000 and current year revenue is $132,000, trend % = (132,000/100,000)×100 = 132%.
Why do analysts use trend analysis instead of looking at raw numbers?
Percentages normalize the data, making it easy to spot the rate and direction of change across years, even across companies of different sizes.