A good score on a 10-key test ranges from 10,000 to 15,000 error-free keystrokes per hour. Most 10-key tests deduct 10 keystrokes per hour for each error. Depending on an employer's testing standards, error correction may or may not be allowed.
The required 10-key speed can range from 5,000 to 15,000 keystrokes per hour depending on the employer and the type of position. Criterion-referenced testing (CRT), which measures performance against a fixed scale, is often used to rate an applicant's 10-key skills using a computer keyboard or adding machine. To increase 10-key proficiency, there are numerous websites that offer tutorials and timed 10-key practice tests.