How to Cut a Tree Branch Properly? | The Three-Cut Method

To cut a tree branch without damaging the tree, always use the three-cut method for branches over 1 inch thick: an undercut, an overcut, and a final cut just outside the branch collar.

A single bad cut leaves a wound that never seals right, inviting decay and disease into the heart of the tree. A clean, well-placed cut does the opposite — the tree walls off the injury fast and keeps growing strong. The difference is knowing exactly where to position the saw and when to use three cuts instead of one.

What Makes a Proper Pruning Cut?

A proper cut is defined by its location, not its angle. The golden rule is to cut just outside the branch collar — the swollen ring of bark at the base of the branch where it meets the trunk or a larger limb. You also cut outside the branch bark ridge, the raised line of bark that runs from the trunk onto the upper side of the branch, per the USDA Forest Service pruning guide.

Cutting flush with the trunk removes the branch collar, creating a wound the tree cannot seal. Leaving a long stub invites rot. The sweet spot is a cut that barely clears these structures, angled slightly down and away from the stem so water runs off. The exposed surface is minimized, and the tree’s natural defense zone stays intact.

The Three-Cut Method for Heavy Branches

For any branch big enough to need a saw, a single top cut will tear the bark downward as the branch falls, ripping a strip off the trunk. The three-cut method prevents this by removing weight and letting the branch break cleanly before you make the final precision cut.

Step 1: The Undercut

From underneath the branch, cut 1/4 to 1/3 of the way through the branch. Position this cut 6 to 8 inches out from the branch collar (Purdue Extension’s Tree Pruning Essentials recommends 6 to 12 inches). This notch stops the bark from peeling upward when the branch drops.

Step 2: The Overcut

Move 1 to 2 inches farther out from the undercut (farther from the trunk). Cut from the top down until the branch snaps off cleanly at the undercut point. The stub left behind is now lightweight, carrying no leverage that could tear the trunk bark.

Step 3: The Finished Cut

Finally, remove the remaining stub by cutting just outside the branch collar and branch bark ridge. This is the only cut that touches the tree’s final form — make it count. The Lowe’s pruning guide notes that on large cuts, you should remove the stub entirely once the branch weight is gone; on small cuts, leaving a 1/4-inch stub helps preserve the collar.

Which Tool Should You Use?

Matching the tool to the branch diameter prevents damage to both the tool and the tree. Anvil shears crush living tissue; bypass shears make a clean scissor cut. Chainsaws on small limbs cause shredding — reserve them for experienced users on large wood only.

If you are shopping for the right hardware, our roundup of the best saws for cutting tree branches covers tested options for every branch size and reach.

When Should You Prune?

Timing depends on the tree type and local disease risks. Prune deciduous trees during the dormant season — after leaves fall in October or November and before buds swell in spring. Evergreens should be pruned late in the dormant season, shortly before new growth begins. Spring-blooming trees get pruned just after flowers fade; summer bloomers can be pruned in winter or early spring.

In areas where oak wilt is present, never prune oaks during spring or early summer. Fireblight-susceptible trees (pears, apples, crabapples) should only be pruned in the dormant season. Avoid pruning during drought — the added stress can weaken the tree.

Common Pruning Mistakes to Avoid

Never top a tree, which means cutting the main trunk or large limbs down to stubs. This triggers rapid, weakly attached regrowth that leads to decline and limb failure. The Purdue Extension guide explicitly warns against it. Flush cuts that remove the branch collar are another leading cause of decay. And when pruning co-dominant stems — two trunks growing parallel — remove the less desirable one, not the taller one. Removing the taller, straight stem can destabilize the tree.

Also, never remove more than 25 percent of the living crown in a single season. If a tree needs more, spread the work over successive years.

Safety First on Every Cut

The USDA Forest Service’s pruning guidelines list the pruning priority order: safety first, then tree health, and finally aesthetics. Before making any cut, look up. If the branch is near a utility line, call the local utility company — do not attempt it yourself. Keep all cutting tools sharp, clean, and rust-free; a dull blade tears tissue, and rust pockets on the blade can transfer bacteria between trees. Chainsaws require experienced operators, proper personal protective equipment, and a clear work area.