How many characters does HSK actually ask you to write?

Most people start by buying a practice book covering all three thousand characters. That is correct if the goal is "learn everything", and wrong if the goal is to spend your time well: you do not need to write all of them.

Two different numbers

HSK separates characters you must read from characters you must write.

Must read (recognise while reading): 3,088 characters
Must write (produce from memory): 1,200 characters

The gap is 1,888 characters — you only need to recognise them, not write them.

This is the single most useful fact when planning study. If you spend writing practice on all 3,088, you are using close to three times the effort for the same result.

The number is smaller still, depending on your level

1,200 is the cumulative figure at the highest level. If you are only taking a lower level, the writing load is much smaller:

Target	Characters to write (cumulative)
HSK 1	100
HSK 2	100
HSK 3	250
HSK 4	400
HSK 5	550
HSK 6	700
HSK 7–9	1,200

Two things stand out in that table.

First, HSK 1 and HSK 2 share the same list of 100 characters. Moving from level 1 to level 2 adds no new characters to write.

Second, the gaps between levels are uneven. Going from level 3 to 4 adds 150 characters, but going from level 6 to 7–9 adds 500. If you are aiming high, most of the volume sits at the end — spread it out from the start instead of saving it for later.

Turning it into a daily number

A concrete example: target HSK 3, so 250 characters, over 90 days.

250 divided by 90 days is about 2.8 characters a day. That is light — roughly five minutes of new writing.

Now target HSK 7–9 with 1,200 characters in 90 days: 13.3 characters a day. At about 100 seconds per new character (write, correct, write again), the new material alone is close to 22 minutes a day, before any review.

Same 90-day window, two targets, nearly five times the daily load. This is why you pick the target and the number of days first, and only then decide how much to do each day.

Review is the larger half

One thing is easy to miss: every new character brings several reviews with it. If each character is reviewed five times at different intervals, 1,200 characters produce 6,000 review encounters.

A review is shorter than a first learning pass (about 8 seconds against 100), but the total is not small. So when you estimate "minutes per day", include review — otherwise the plan is always behind.

The short version

You do not need to write 3,088 characters. You need the characters for the level you are taking, plus the review load of exactly those characters. Choose the target first, then divide the days.