Yıl bitince işten ayrılacağım.

Bitince comes from the verb bitmek = to end / to finish.

It is made of:

• bit- = the verb stem
• -ince = a suffix meaning when, once, or after

So:

• yıl bitince = when the year ends / once the year is over

This suffix is very common in Turkish for time clauses:

• gelince = when he/she comes
• eve varınca = when I arrive home
• iş bitince = when the work is finished

In this sentence, bitince sets the time for the main action.

Because Turkish usually does not use a future tense form in the when clause here.

In English, we say:

• When the year ends, I will leave my job.

Notice that English also uses the present form ends, not will end, in the when clause.

Turkish works similarly:

• Yıl bitince = when the year ends
• ... ayrılacağım = I will leave

So the future meaning is already understood from the context and from the main verb ayrılacağım.

Here yıl is the subject of bitince.

• yıl = the year / year
• yılı would usually be an accusative or possessed form, depending on context

In Yıl bitince, the meaning is simply when the year ends. No accusative marking is needed because yıl is not a direct object.

Compare:

• Yıl bitince = when the year ends
• Yılı bitirdim = I finished the year

In the second sentence, yılı is the object, so it takes accusative marking.

İşten is:

• iş = work / job
• -ten = the ablative ending, often meaning from

So işten literally means from the job / from work.

The reason for this ending is that the verb ayrılmak normally takes the thing you leave in the ablative:

• okuldan ayrılmak = to leave school
• evden ayrılmak = to leave home
• işten ayrılmak = to leave one’s job / quit one’s job

So the -ten is required by the verb pattern.

Ayrılacağım means I will leave or, in this context, I will quit.

It can be broken down like this:

• ayrıl- = leave / separate oneself
• -acak / -ecek = future tense
• -ım / -im / -um / -üm = I

Because of sound changes and vowel harmony, these combine into:

• ayrılacağım = I will leave

So the full sentence is structured like this:

• Yıl bitince = when the year ends
• işten ayrılacağım = I will leave my job

Not exactly.

Ayrılmak basically means to leave, to separate, or to part from. In job contexts, işten ayrılmak is a very common way to say:

• to leave a job
• to quit a job
• sometimes to resign

But it is slightly broader than English resign.

For example:

• İşten ayrıldım. = I left my job / I quit my job.
• İstifa ettim. = I resigned.

So in this sentence, işten ayrılacağım is natural Turkish for I’m going to leave my job or I’ll quit my job.

It looks that way, but the safest approach is to learn ayrılmak as a whole dictionary verb.

Turkish has many verbs ending in -ıl / -il / -ul / -ül, and sometimes that ending is related historically to passive or reflexive forms. But for learners, it is usually best to treat ayrılmak as simply the normal verb meaning:

• to leave
• to separate

Its partner is:

• ayırmak = to separate something, to set apart

So:

• Onlar iki grubu ayırdı. = They separated the two groups.
• Ben işten ayrıldım. = I left my job.

It most literally means:

• when the year ends
• once the year is over

In real usage, that often overlaps with:

• at the end of the year

So the exact English translation depends on context.

Yıl bitince emphasizes the moment or point after the year has ended.
If someone wanted a more fixed calendar-style expression, they might also say:

• Yıl sonunda = at the end of the year

These are close, but not identical:

• Yıl bitince işten ayrılacağım. = I’ll leave my job when the year ends.
• Yıl sonunda işten ayrılacağım. = I’ll leave my job at the end of the year.

Yes, depending on context, but the most natural interpretation is usually quit my job.

That is because işten ayrılmak is a common set expression meaning to leave one’s job.

If someone only meant leaving the workplace physically, Turkish would more naturally use something like:

• işten çıkmak = to get off work / leave work
• iş yerinden ayrılmak = to leave the workplace

So in most contexts:

• işten ayrılacağım = I’ll quit my job / leave my job

Turkish often puts the time expression before the main clause.

So this order is very natural:

• Yıl bitince = when the year ends
• işten ayrılacağım = I’ll leave my job

Turkish is flexible, but the verb usually comes at the end. That is the most important part.

This sentence has a very standard structure:

[time clause] + [other information] + [main verb]

You could move parts around for emphasis, but this version is neutral and natural.

You probably could be understood, but it sounds less natural as a neutral sentence.

The most natural version is:

• Yıl bitince işten ayrılacağım.

That puts the time clause first, which is common in Turkish.

If you move işten forward, it may sound marked or emphasize the job in contrast to something else. Learners should generally stick with the original order unless they have a reason to emphasize something.

This suffix changes according to vowel harmony:

• -ınca
• -ince
• -unca
• -ünce

The choice depends on the last vowel of the verb stem.

Since bit- has the vowel i, the correct form is:

• bitince

More examples:

• bakınca = when he/she looks
• gelince = when he/she comes
• okuyunca = when he/she reads
• gülünce = when he/she laughs

So bitmek → bitince follows the normal vowel harmony pattern.

Yes. The future suffix is usually taught as:

• -acak / -ecek

Then personal endings are added.

For ben, the ending is -ım / -im / -um / -üm.
When these combine, some sound changes happen.

So:

• ayrıl + acak + ım
• becomes ayrılacağım

This is a normal pattern in Turkish:

• yapacağım = I will do
• gideceğim = I will go
• kalacağım = I will stay

So ayrılacağım is exactly what you should expect from the future tense.

A few natural translations are:

• When the year ends, I’ll leave my job.
• I’ll quit my job when the year is over.
• At the end of the year, I’m going to leave my job.

The best choice depends on context, but all of these match the Turkish sentence well.