“I’ll Get Back to You” Means “I’ll Reply After Checking”

“I’ll get back to you” means that the speaker will check, ask or think first, then contact you with an answer. It is natural in Australian workplaces and everyday conversation, but it does not itself mean yes, nor does it specify when the reply will come.

For example, if a colleague asks whether you can confirm the delivery cost today, you might say, “I need to check. I’ll get back to you this afternoon.” Adding this afternoon gives the promise a clear boundary.

Chinese speakers sometimes say “I’ll reply you later”. In standard English, reply normally takes to before a person. When the answer depends on checking something, get back to you is often more natural. If the matter is urgent, add a specific time so the phrase does not become vague delay.

Sources: https://dictionary.cambridge.org/dictionary/english/get-back-to; https://www.oxfordlearnersdictionaries.com/definition/english/get-back