TOEIC Decision Point

By the Time vs Until: Complete by a Point or Continue to It

In TOEIC Part 5, by the time and until often appear in sentences about deadlines, office hours, temporary systems, project stages, and scheduled arrivals.

The fast choice is not “What is the grammar name?” The fast choice is: must something be complete by that point, or does an action continue up to that point?

By the time = complete no later than that event. Until = continue up to that event or time.

The 7-second choice

Build a quick timeline. Does the sentence focus on a result that must already be ready, or a situation that remains true and then stops?

By the time

A result is complete no later than another event: by the time the meeting begins, by the time the shipment arrives.

Until

An action or condition continues and then ends: remain closed until noon, use the old system until testing finishes.

The signal to remember

Ready by that point = by the time. Continues to that point = until.

This is the MTC move. Follow the shape of the timeline.

By the time the client arrives, the meeting room will be ready.
The room must already be ready when the client arrives. Choose by the time.

The meeting room will remain closed until the client arrives.
The closed condition continues and then ends. Choose until.

By the time production begins, all materials should have arrived.
Arrival must be complete no later than the start of production.

The temporary supplier will remain responsible until production begins.
The responsibility continues up to that point.

What TOEIC wants you to notice

TOEIC often hides the answer in the type of action around the blank.

will be ready / will have finished / should have arrived
These often point to a result that must be complete by another event.

remain open / continue operating / stay in effect
These often point to a condition continuing up to another event.

Watch the action before the blank

The main action often gives the answer before you read the entire sentence.

Completion signal

Ready, complete, finish, submit, deliver, install, approve.

Continuation signal

Remain, continue, stay, operate, wait, hold, keep.

The update will be complete by the time employees return.
Completion is the goal.

The old system will remain active until employees return.
The old system continues and then stops.

Under pressure, ask one question: complete by then, or continue until then?

Quick TOEIC check

Choose first. Then read the feedback. Use the one-second check: finished by the point, or continuing to the point?

1. ___ the office reopens on Monday, the software update will have been completed.

By the time Until

Correct: By the time

The update must already be complete when the office reopens.

Not quite.

The sentence focuses on a completed result, not an action continuing. Choose By the time.

2. The reception desk will remain closed ___ 1 p.m. while the staff attend training.

by the time until

Not quite.

The closed condition continues up to 1 p.m. Choose until.

Correct: until

The desk remains closed and then reopens at that point.

3. ___ the auditors arrive, all supporting documents should be ready for review.

By the time Until

Correct: By the time

The documents must already be ready when the auditors arrive.

Not quite.

The sentence focuses on readiness by a deadline point. Choose By the time.

4. The temporary booking system will remain in use ___ the new platform is fully tested.

by the time until

Not quite.

The temporary system continues up to the testing point. Choose until.

Correct: until

The temporary system remains active and then stops being used.

The mistake fast readers make

Fast readers often see a future event after the blank and choose without checking whether the main action completes or continues.

Weak choice

Treat both expressions as a general way to say “before this future point.”

Better choice

Check the main action: result complete, or condition continuing?

Why this mistake returns under pressure

Japanese can express both ideas with a similar time frame. English makes the difference through the action pattern around the time point.

Do not translate only the time expression. Follow the action across the timeline.

1-second tool: complete by that event = by the time. Continue to that event = until.

Related practice

Continue building fast time decisions

These related pages also train the test-taker to find the deadline, reference point, and action timeline.

Read In Time vs On Time Read Ago vs Before Take the Part 5 Checkpoint

Next step

Use small TOEIC mistakes as a diagnostic

If you understand the answer during review but miss it under time pressure, the problem may be your decision pattern rather than the words alone.

Start with the Learning Block Diagnostic to see whether your mistakes connect to Speed Trap, Memoriser, Over Thinker, Translator, Passive Listener, or Burnout.

Take the Learning Block Diagnostic Find Your TOEIC Plan Browse the Strategy Library

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Use these pages to turn small TOEIC mistakes into faster decisions and better review.