Why does my accuracy fall when I try to type faster?

This is a natural trade-off due to limited cognitive bandwidth. When you increase speed, your brain reduces precision to maintain tempo. The cause: your finger motor memory hasn't automated each keystroke; you're still thinking about finger movements. To fix: practice at an uncomfortable but still accurate speed (e.g., 90% of your max error-free speed) until that becomes natural. Use Keybr.com's 'accuracy first' mode. Also, your hands may be tense – speed shouldn't come from force but from efficient movement. Slow down until you can type without errors, then add 2-3 WPM per week.