Detailed Answer
Yes, in most tests mistakes reduce your net WPM. Common methods: 1) Deduct 1 WPM per error (e.g., TypingTest.com). 2) Count only correctly typed characters (Monkeytype, Keybr). 3) Exclude entire wrong words from calculation (some 10FastFingers variants). 4) No penalty but display accuracy separately. The strictest exams require 97%+ accuracy; even one error per minute can drop you from passing to failing. Never ignore errors – practice correction strategies.