To calculate the income tax deducted on earnings of $1,000 with a tax rate of 25%, you can use the formula:
\[ \text{Income Tax} = \text{Earnings} \times \text{Tax Rate} \]
Substituting the given values:
\[ \text{Income Tax} = 1,000 \times 0.25 = 250 \]
Therefore, the income tax deducted would be $250.