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Prepositions after deduct

Deduct from, at, by, for or in?

Use deduct from for the total or source from which something is removed. By can show the amount of reduction in some contexts. At, for, and in are not normal direct complements after deduct.

Quick answer

How to use deduct correctly

The usual pattern is deduct something from something: Deduct tax from your salary. By may appear when describing the amount reduced. At, for, and in usually belong to other parts of the sentence rather than directly following deduct.

The company deducted tax from employees' salaries.
You can deduct 10% from the total.
The amount was deducted by the accountant before payment.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
deduct + amount from + total

Remove an amount from a larger figure

Use from for the total, salary, bill, or quantity reduced.

Please deduct the fee from the refund.
They deducted travel costs from the budget.
2
deduct from + source

Identify where the deduction comes from

From can introduce the account, payment, or amount affected.

Insurance is deducted from her paycheck each month.
The charge was deducted from my balance automatically.
3
deduct by + amount

State the size of a reduction

By may describe how much a figure changes, especially in technical or mathematical contexts.

The value was deducted by 5% after review.
The score was deducted by two points for a late submission.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
deduct from
Deduct the cost from the final price.
Standard pattern showing the source or total reduced.
deduct by
The score was deducted by three points.
By introduces the amount of reduction in some contexts.
deduct for
The company deducted money for damages.
For can explain the reason for the deduction, not the object reduced.
deduct in
Tax was deducted in April.
In introduces time here, not a complement after deduct.

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using at after deduct

At is not a normal complement after deduct.

✕ They deducted the fee at my salary. ✓ They deducted the fee from my salary.

Using for instead of from

From introduces the amount or source reduced.

✕ Deduct the charge for the total. ✓ Deduct the charge from the total.

Confusing by and from

By gives the amount of change; from gives the source or total.

✕ They deducted 5% by the bill. ✓ They deducted 5% from the bill.

Using in as the direct complement

In usually expresses time or place, not the object of deduction.

✕ Tax was deducted in my salary. ✓ Tax was deducted from my salary.

Quick practice

Choose the expression that matches the intended meaning.

1. Please deduct the fee ___ the total amount.
2. The score was deducted ___ two points.
3. The company deducted money ___ repairs.

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Frequently asked questions

What is the usual preposition after deduct?

The standard pattern is deduct something from something.

Can deduct be followed by by?

Yes, especially when describing the amount reduced, such as deducted by five points.

Is deduct for correct?

Yes, when for explains the reason, such as deduct money for repairs. It does not replace from in the main pattern.

dabble, in, dabble, with "damage to" or "damage by"? dance to, with, on, in or for? "dangle from" or "dangle in"? dare to, for, on, as or at? dash to, into, out, from or on? daydream about, for, in, of or on? "debate in", "debate on" or "debate with"? deceive by, in, into, on or about? "decide on", "decide to" or "decide by"? declare in, by, on, to or as? decline in, by, from, to or for?

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