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Year-Over-Year Calculation

Year-over-year (YoY) growth compares a metric from one period to the same period the previous year, eliminating seasonal variations. The core formula is: YoY Growth = ((Current Period - Previous Period) ÷ Previous Period) × 100. For example, when revenue increased from $100k to $120k, the YoY growth reached 20%. Lenders typically rely on this metric to evaluate business performance and assess loan repayment capacity.

  • Eliminates seasonal variations by comparing identical periods across years
  • Formula: YoY Growth = ((Current Period - Previous Period) ÷ Previous Period) × 100
  • Lenders use YoY to evaluate revenue and profit trends for loan decisions
  • 20%+ YoY growth is viewed favorably by lenders
  • Consistent positive growth improves approval odds and interest rates

This page includes an interactive YoY calculator — enter current and prior period values to compute growth percentage instantly.

Open the tool →

Year-Over-Year Growth Formula

YoY Growth = ((Current Period - Previous Period) ÷ Previous Period) × 100

This calculation determines the percentage change annually. Positive results indicate growth; negative results show decline.

Year-Over-Year Calculation Examples

Example 1: Revenue Growth
Revenue 2023: $200,000 / Revenue 2024: $250,000
YoY Growth = (($250,000 - $200,000) ÷ $200,000) × 100 = 25% growth

Example 2: Profit Decline
Net Income 2023: $50,000 / Net Income 2024: $40,000
YoY Growth = (($40,000 - $50,000) ÷ $50,000) × 100 = -20% decline

Why Year-Over-Year Growth Matters

  • Eliminates seasonal variations by comparing identical periods across years
  • Reveals authentic business growth versus seasonal fluctuations
  • Informs lender assessment of business health and repayment ability
  • Enables strategic planning by identifying true trends

What Growth Rates Mean

20%+: Excellent growth viewed favorably by lenders.

10–20%: Healthy expansion with strong lender approval prospects.

0–10%: Moderate positive growth; acceptable for mature firms.

Negative: Declining performance; considered problematic by lenders.

Calculating YoY for Different Periods

YoY metrics can measure revenue, quarterly performance, monthly changes, profit, and customer count comparisons. The same formula applies regardless of the metric—compare the current period value to the same period in the prior year.

Frequently asked questions

What's a good year-over-year growth rate?
Industry and business stage determine acceptability. Small businesses targeting 10–20% is standard; startups often aim for 50%+; mature businesses may target 5–10%.
Why use YoY instead of month-over-month?
YoY eliminates seasonal variations. Seasonal spikes don't reflect actual business growth; comparing identical months reveals true performance trends.
How do lenders use YoY growth?
Lenders evaluate revenue and profit growth to determine business health and repayment capacity. Consistent positive growth improves approval odds and rates.
What if I don't have a full year of data?
New businesses can measure from their start date. After operating a full year, transition to standard YoY comparisons.

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