from than (then) on

'From than on' mistakes swap a comparison word (than) for a time word (then). The fix is simple once you spot whether the sentence talks about time or comparison.

Quick answer

Use "from then on" to mean "starting at that time." "Than" is for comparisons, so "from than on" is incorrect.

Then = time / sequence (use "from then on" for "after that").
Than = comparison (bigger than, rather than).
Quick fix: if "after that" fits, swap in "then."

Core explanation: then vs. than

Then denotes time or sequence; than links two items in a comparison. They sound alike but serve different roles.

Then = when / next / after that. Example: "We ate, then left."
Than = comparison. Example: "She is taller than Sam."

Grammar check: a two-step test you can use instantly

Two quick substitutions cut through doubt.

Step 1: Replace the word with "after that" or "next." If the sentence still reads naturally, use then.
Step 2: If the sentence compares two things or answers "which one," use than.

Test: "From ___ on, we changed the schedule." → "From after that on" makes sense → use "then."

Spacing and typos: why spell-check won't help

"Than" is a valid word, so simple spell-checkers usually won't flag the mistake. Treat this as a meaning error.

Search for the exact phrase "from than on" in long documents.
Use a context-aware grammar tool to catch wrong-but-valid words.

Typing example: Incorrect: "From than on, the system runs nightly backups." - a spell-check passes; a usage check should flag it.

Hyphenation and punctuation: common formatting questions

No hyphen is needed. Commas depend on rhythm: use one after the phrase if it introduces the sentence or you want a pause.

No hyphen: not "from-then-on."
Comma optional: "From then on, we met weekly." or "From then on we met weekly."

Punctuation: A comma is optional for emphasis or a pause, not required for correctness.

Try your own sentence

Test the whole sentence in context: replacing the phrase often reveals whether "then" or "than" belongs.

Examples: realistic wrong/right pairs (work, school, casual)

Each wrong sentence shows the common error; the right sentence gives the correction and small natural tweaks where needed.

Work - Wrong: "From than on, the new policy applies to all employees."
Right: "From then on, the new policy applied to all employees."
Work - Wrong: "We'll log issues from than on and share weekly summaries."
Right: "We'll log issues from then on and share weekly summaries."
Work - Wrong: "From than on, submit invoices by the 5th."
Right: "From then on, submit invoices by the 5th."
School - Wrong: "From than on, the lecture moved to Tuesdays."
Right: "From then on, the lecture moved to Tuesdays."
School - Wrong: "He studied harder from than on after the midterm."
Right: "He studied harder from then on after the midterm."
School - Wrong: "From than on, labs will follow the new safety checklist."
Right: "From then on, labs will follow the new safety checklist."
Casual - Wrong: "From than on, I'm not answering calls after 10pm."
Right: "From then on, I'm not answering calls after 10 p.m."
Casual - Wrong: "We got lost once and from than on we used offline maps."
Right: "We got lost once, and from then on we used offline maps."
Casual - Wrong: "From than on, she avoided that bakery."
Right: "From then on, she avoided that bakery."

Rewrite help: quick patterns and live rewrites

Patterns that work well:

"From then on, [subject] [verb]..."
"[Event]. From then on, [consequence]."
Alternatives for variety or formality: "after that," "since then," "thereafter," or "from that point forward."

Rewrite 1 - Original: "From than on, it'll be different." → "From then on, it will be different."
Rewrite 2 - Original: "From than on enrollments dropped." → "From then on, enrollments dropped."
Rewrite 3 - Original: "From than on everyone knew the rules." → "From then on, everyone knew the rules."

Real usage and tone: formal substitutes and casual alternatives

"From then on" is neutral and fits most contexts. For more formal writing choose "thereafter" or "from that point forward." In conversation, "after that" or "since then" can sound smoother.

Formal: "Thereafter, all entries were archived."
Neutral: "From then on, all entries were archived."
Casual: "After that, we archived everything."

Memory trick and similar mistakes to watch for

Mnemonic: Then = time (think "then" = "when"). Than = comparison (think "more than"). Two substitution checks catch most errors.

Substitute "after that" → then. Substitute "more/less" → than.
Watch similar meaning errors: its/it's, your/you're, accept/except - correct meaning matters more than spelling.

Similar: Check "it's" vs "its" by reading for meaning, not just spelling.

FAQ

Is it "from than on" or "from then on"?

It's "from then on." Use "then" when you mean "after that" or "from that time."

How do I remember whether to use then or than?

Quick test: replace the word with "after that." If it fits, use "then." If you're making a comparison, use "than."

Will spell-check catch "from than on"?

Not usually. "Than" is a correct word. Use a context-aware grammar checker or search your document for the exact phrase.

Is "from then on" acceptable in formal writing?

Yes-it's neutral. For stricter formality, choose "thereafter" or "from that point forward."

Do I need a comma after "from then on"?

Optional. Use a comma if you want a pause: "From then on, she arrived early." No comma also works: "From then on she arrived early."

Quick check before you send

If a sentence feels off, try the two substitution checks: "after that" vs "more/less." If you're still unsure, paste the sentence into the usage checker above - it will flag "from than on" and suggest "from then on."