Factor in means include something in a calculation or plan: remember to factor in the time needed to change trains. People factor in money, time, risks and even other people's preferences. Factor something into means include it in something specific: we factored the cleaning time into the schedule.
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factor in something; factor it in; factor something into a plan / calculation
- Remember to factor in the time needed to change trains.
- The delivery charge looks small until you factor it in for every order.
- We factored the cleaning time into the event schedule.
What changed
First versionI forgot the parking charge and didn't factor in it.
RevisionI forgot the parking charge and didn't factor it in.
Most verbs take the object right after them, so factor in it looks logical. But with a phrasal verb, a pronoun goes between the parts: factor it in. With a noun both orders work: factor in the cost or factor the cost in.
Take into account means consider, and sounds a little more formal: we took your feedback into account. Factor in means build a specific amount into a calculation: factor in parking costs. When it's about numbers, time and money, factor in sounds more natural.
Your turn
Complete the construction that names the plan: Factor the travel time ___ your schedule.
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into — To name the plan something goes into, you need into: factor the travel time into your schedule. Onto doesn't fit here.
Describe something that's easy to forget to factor in when planning a trip, a renovation or a party.
We need to factor the walk from the station into our arrival time.
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