baesongbiga jeomjeom bissajipnida.

배송비 is a compound noun:

• 배송 = delivery, shipping
• 비 = fee, cost, expense

So 배송비 means shipping cost or delivery fee.

This kind of noun combination is very common in Korean. You will often see:

• 교통비 = transportation cost
• 식비 = food expenses
• 수리비 = repair cost

가 marks 배송비 as the subject: the shipping cost is what is becoming expensive.

So:

• 배송비가 점점 비싸집니다 = The shipping cost is gradually becoming more expensive.

If you used 는, the nuance would change a little. 배송비는 would sound more like you are introducing or contrasting the topic, as in:

• 배송비는 점점 비싸집니다. = As for shipping costs, they are getting more and more expensive.

Both are possible, but 가 is very natural when simply stating what is happening.

점점 means gradually, more and more, or increasingly.

It shows that the change happens little by little over time.

Examples:

• 날씨가 점점 추워져요. = The weather is getting colder and colder.
• 한국어가 점점 재미있어집니다. = Korean is becoming more and more interesting.

In this sentence, 점점 modifies the whole change:

• 점점 비싸집니다 = becomes more and more expensive

This is one of the most important grammar points in the sentence.

• 비쌉니다 = is expensive
• 비싸집니다 = becomes expensive / gets expensive

The pattern is:

• adjective stem + 아/어지다 = to become ...

So:

• 비싸다 = to be expensive
• 비싸지다 = to become expensive
• 비싸집니다 = becomes expensive / is getting expensive

Because 점점 describes a change over time, 비싸집니다 fits better than 비쌉니다.

It comes from:

• 비싸다 → adjective stem 비싸-
• add -아/어지다 → 비싸지다
• polite formal present ending -ㅂ니다 → 비싸집니다

So the structure is:

• 비싸다 = to be expensive
• 비싸지다 = to become expensive
• 비싸집니다 = becomes expensive / is becoming expensive

This same pattern works with many adjectives:

• 커지다 = to become big
• 작아지다 = to become small
• 좋아지다 = to become good / improve
• 나빠지다 = to become bad / worsen

It is in the present polite formal form, but in Korean this form often covers ideas that English expresses as is becoming.

So 비싸집니다 can naturally be understood as:

• becomes expensive
• is becoming expensive
• is getting more expensive

With 점점, the most natural English translation is usually:

• Shipping costs are getting more and more expensive.

So even though the Korean form looks like present tense, it often describes an ongoing change.

-ㅂ니다 / -습니다 is the formal polite style.

So 배송비가 점점 비싸집니다 sounds appropriate in:

• news reports
• announcements
• business writing
• formal conversation
• presentations

In casual polite speech, you would more often hear:

• 배송비가 점점 비싸져요.

In plain casual speech:

• 배송비가 점점 비싸져.

The meaning is the same; only the speech level changes.

Good question. In Korean, 점점 already gives the idea of more and more, so 더 is not necessary here.

• 점점 비싸집니다 = gets more and more expensive

You can use 더 in other contexts, but with 점점, it is often omitted because the gradual increase is already clear.

Compare:

• 배송비가 비싸집니다. = Shipping cost is becoming expensive.
• 배송비가 점점 비싸집니다. = Shipping cost is becoming more and more expensive.

So 점점 does a lot of the work by itself.

It can mean either, depending on context.

• In a specific shopping situation, it may mean the shipping fee.
• In a broader statement, it can mean shipping costs in general.

So this sentence could mean:

• The shipping fee is getting more expensive.
• Shipping costs are getting more and more expensive.

English often chooses singular or plural based on context, but Korean does not always mark that distinction clearly.

In everyday speech, people would often say:

• 배송비가 점점 비싸져요.

That is the same meaning in the usual polite spoken style.

You might also hear:

• 배송비가 점점 올라가요. = Shipping costs keep going up.

Both are natural, but the nuance is slightly different:

• 비싸지다 focuses on becoming expensive
• 올라가다 focuses on going up / increasing

Yes, a little.

비싸집니다 is written that way, but in actual pronunciation it sounds close to:

• 비싸짐니다

This is because the ㅂ in -ㅂ니다 changes in pronunciation after certain sounds.

Also:

• 배송비 is pronounced roughly like bae-song-bi
• 점점 sounds like jeom-jeom
• 비싸집니다 sounds roughly like bi-ssa-jim-ni-da

You do not need to change the spelling, but it helps to know why spoken Korean may sound a bit different from the written form.