Onto vs. On To: What's the Difference?

Quick Answer

onto = preposition — movement to a position on a surface

on to = "on" (part of a phrasal verb) + separate "to" (move on to, hold on to)

Explanation

ONTO (one word)

Preposition: movement to a surface/position

"The dog jumped onto the bed."

"She climbed onto the roof."

ON TO (two words)

"On" is part of a phrasal verb + "to"

"Let's move on to the next item." (move on)

"Hold on to your hat." (hold on)

Quick test: Remove "to" — does the remaining phrase still make sense as a verb (move on, hold on, log on)? Write on to. Otherwise, if it's about physical movement onto a surface, write onto.

Examples

The ball rolled onto the field. (movement to a surface)
Let's move on to question three. (move on + to)
He stepped onto the stage. (movement to a surface)
Please log on to the system. (log on + to)
We need to move onto the next topic.

Common Mistakes

Incorrect: Hold onto your tickets until you reach the gate.

Correct: Hold on to your tickets until you reach the gate. (hold on + to)

Incorrect: The cat leaped on to the windowsill.

Correct: The cat leaped onto the windowsill. (movement to a surface)

Practice

Choose the correct form:

"The kids climbed _____ the fence, then we moved _____ the next activity."

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