How often should you sharpen your kitchen knives?

After 15 years working as a chef, the most common question I get as a mobile knife sharpener isn't about steel types or edge angles — it's simply: how often does this actually need doing? Here's the honest answer, for home kitchens and professional ones.

The short answer

• Home cooks: a professional sharpen every 6–12 months keeps most kitchen knives performing properly.
• Heavy home use (cooking daily, lots of prep): every 4–6 months.
• Professional kitchens: every 1–3 months, depending on volume. A busy line knife dulls astonishingly fast.

Honing vs sharpening — they're not the same thing

That steel rod in your knife block doesn't sharpen anything. Honing realigns a rolled edge — it stands the existing edge back up straight, buying you time between sharpens. Sharpening removes a small amount of steel to create a genuinely new edge. Honing weekly and sharpening professionally a couple of times a year is the combination that keeps a knife at its best.

Signs your knife is overdue

• It slides across tomato skin instead of biting in
• You're pressing down instead of slicing through
• Herbs bruise and smear rather than cut cleanly
• You can see light glinting off flat spots along the edge
• It's been more than a year — it's overdue, full stop

Does frequent sharpening wear knives out?

Only if it's done badly. High-speed dry grinding overheats the edge and strips away far more steel than needed — that's what eats knives. A slow wet belt sharpening system removes the minimum steel necessary and keeps the edge cool, so regular professional sharpening actually extends a knife's working life. It's the difference between a haircut and a scalping.

The safety point nobody mentions

Dull knives cause more kitchen injuries than sharp ones. A dull edge needs force, and force is what makes a blade skate off an onion and into a finger. A sharp knife goes exactly where you point it. If someone in your house is nervous around knives, a professional sharpen is genuinely the safest thing you can do.

Curious what it costs? See our full breakdown: How much does knife sharpening cost in Brisbane?