Я всегда кладу студбилет в кошелёк, чтобы не забыть его дома.

In standard Russian, the normal verb here is класть = to put, to place. Its 1st person singular present form is кладу: я кладу = I put.

Many learners expect ложу from ложить, but ложить is generally considered nonstandard in modern literary Russian. So:

• я кладу = correct standard Russian
• я ложу = usually treated as incorrect/nonstandard

A very common pair is:

• класть → imperfective: to put, to be putting
• положить → perfective: to put, to place once / successfully

So Я всегда кладу... means I always put... as a habitual action.

In Russian, the present tense is commonly used for habitual actions, just like in English:

• Я всегда кладу... = I always put...

It does not mean only right now. It can also mean as a regular habit. The word всегда (always) makes the habitual meaning very clear.

Студбилет is a shortened, colloquial form of студенческий билет, which means student ID card or student pass.

So:

• студенческий билет = full, neutral form
• студбилет = shorter, informal/everyday form

A native speaker might use студбилет casually in conversation, but in more formal contexts you may see студенческий билет.

Because студбилет is the direct object of кладу and it is an inanimate masculine noun. In the accusative singular, many inanimate masculine nouns look exactly like the nominative singular.

So:

• nominative: студбилет
• accusative: студбилет

That is why the form does not change here.

This is a very important Russian pattern:

• в + accusative = movement into something
• в + prepositional = location in something

Here the speaker is putting the student ID into the wallet, so Russian uses в кошелёк.

Compare:

• Я кладу студбилет в кошелёк. = I put the student ID into the wallet.
• Студбилет лежит в кошельке. = The student ID is in the wallet.

So:

• кошелёк = accusative singular here
• кошельке would mean location, not direction

It is the accusative singular after в because there is movement toward the inside of something.

For this noun:

• nominative: кошелёк
• accusative: кошелёк
• prepositional: в кошельке

Like студбилет, it is an inanimate masculine noun, so nominative and accusative singular are the same in form.

Чтобы means so that, in order to, or so as to, depending on context.

In this sentence:

• Я всегда кладу студбилет в кошелёк, чтобы не забыть его дома.
• I always put my student ID in my wallet so that I don’t leave it at home / so as not to forget it at home.

Here чтобы introduces the purpose of the action. The speaker puts the ID in the wallet for the purpose of not forgetting it at home.

Because here Russian uses the perfective infinitive забыть to express the result the speaker wants to avoid: to forget once / to end up forgetting.

• забыть = perfective, to forget
• забывать = imperfective, to be forgetting / to forget repeatedly

After чтобы, Russian often uses the perfective infinitive when talking about a concrete intended result:

• чтобы не забыть = so as not to forget

This sounds natural because the idea is not about an ongoing process of forgetting, but about preventing one specific bad outcome.

Его refers to студбилет.

So literally:

• чтобы не забыть его дома = so as not to forget it at home

Because студбилет is masculine singular, the pronoun is его = him/it. Here, since it refers to a thing, it means it.

Because его is the form used for the direct object here.

Compare:

• он = he/it as the subject
• его = him/it as the object

In this sentence, the student ID is not doing the action; it is the thing being forgotten. So Russian uses the object form:

• не забыть его = not to forget it

Here дома means at home.

This is a very common adverb in Russian:

• Я дома. = I’m at home.
• оставить дома = to leave something at home
• забыть дома = to forget something at home

So in the sentence:

• не забыть его дома = not to forget it at home

Do not confuse this with дома meaning houses. Context tells you which meaning is intended.

Also, в доме means in the house/building, which is more literal and physical. But when Russian means at home, the natural word is usually дома.

Yes, Russian word order is fairly flexible, but the original order is natural and clear:

• Я всегда кладу студбилет в кошелёк, чтобы не забыть его дома.

This order sounds neutral:

1. subject: Я
2. adverb: всегда
3. verb: кладу
4. object + destination: студбилет в кошелёк
5. purpose clause: чтобы не забыть его дома

You could move things around for emphasis, but not every version sounds equally natural. For example:

• Я кладу студбилет всегда в кошелёк... — possible, but less neutral
• Чтобы не забыть его дома, я всегда кладу студбилет в кошелёк. — very natural if you want to emphasize the purpose first

So yes, the order is flexible, but the given sentence is a good standard version.

Yes, absolutely. That is a very natural English translation.

Depending on style, you could also say:

• I always put my student ID in my wallet so I don’t forget it at home.
• I always keep my student ID in my wallet so I don’t leave it at home.
• I always put my student ID in my wallet so as not to forget it at home.

The exact English wording can vary, but the Russian structure and meaning stay the same.