Bukti pendapatan itu lengkap.

Malay often does not use a copula (a linking verb like is / am / are) in simple sentences.

So:

• Bukti pendapatan itu lengkap
• literally: proof income that complete
• natural English: That proof of income is complete / The proof of income is complete

This is completely normal in Malay.
The adjective lengkap can act as the predicate without any extra word meaning is.

If you want, you can add words like:

• sudah = already
• masih = still
• akan = will

For example:

• Bukti pendapatan itu sudah lengkap. = The proof of income is already complete.

Literally, it is:

• bukti = proof, evidence
• pendapatan = income

So bukti pendapatan is literally income proof or proof of income.

This is a common Malay pattern: noun + noun, where the second noun describes the first.

Other similar patterns:

• kad pengenalan = identity card
• surat tawaran = offer letter
• borang permohonan = application form

So bukti pendapatan is a noun phrase, not a full sentence by itself.

In Malay, demonstratives like ini (this) and itu (that) usually come after the noun phrase they describe.

So:

• bukti pendapatan itu = that proof of income / the proof of income
• rumah itu = that house
• kereta ini = this car

This is different from English, where this/that usually come before the noun.

A useful pattern is:

• noun + ini/itu

And if the noun phrase has more than one word, ini/itu usually goes at the end of the whole phrase:

• bukti pendapatan itu
• surat pengesahan kerja ini
• borang permohonan itu

Good question. Itu basically means that, but in real usage it can also make something sound specific/known, which sometimes feels close to English the.

So in this sentence, depending on context, bukti pendapatan itu could feel like:

• that proof of income
• the proof of income

Malay does not have a direct article system like English a/the, so words like itu often help mark something as specific.

Very roughly:

• bukti pendapatan = proof of income (general)
• bukti pendapatan itu = that/the proof of income (specific)

Lengkap is basically an adjective meaning complete.

In this sentence, it functions as the predicate:

• Bukti pendapatan itu = subject
• lengkap = predicate adjective

Because Malay does not need is, an adjective can directly complete the sentence:

• Rumah itu besar. = The house is big.
• Makanan ini sedap. = This food is delicious.
• Bukti pendapatan itu lengkap. = The proof of income is complete.

So it is best understood as an adjective, not a verb.

In normal Malay, the most natural order is:

• Bukti pendapatan itu lengkap.

Putting lengkap first:

• Lengkap bukti pendapatan itu

is not the usual neutral word order. It might sound poetic, emphatic, or unnatural depending on context.

For everyday standard Malay, stick with:

• subject + predicate
• Bukti pendapatan itu lengkap.

Yes, it sounds quite natural in a formal or administrative context.

You might hear or read it when talking about documents for:

• job applications
• loan applications
• visa applications
• rental applications
• government paperwork

Because bukti pendapatan is a document-related expression, the sentence has a slightly official feel.

Examples of similar formal sentences:

• Dokumen itu lengkap. = The document is complete.
• Maklumat anda belum lengkap. = Your information is not yet complete.
• Bukti pendapatan itu tidak lengkap. = The proof of income is incomplete.

You would usually say:

• Bukti pendapatan ini lengkap.

Here:

• ini = this
• itu = that

So the contrast is:

• bukti pendapatan ini = this proof of income
• bukti pendapatan itu = that proof of income

Again, notice that ini/itu come after the noun phrase.

You can say:

• Bukti pendapatan itu tidak lengkap.

Here:

• tidak = not

This is the normal negator used before adjectives and verbs.

Compare:

• lengkap = complete
• tidak lengkap = incomplete / not complete

Examples:

• Borang itu tidak lengkap. = The form is incomplete.
• Maklumat ini tidak tepat. = This information is not accurate.

They are related, but not identical.

• pendapatan = income, earnings, revenue
• gaji = salary, wages

So bukti pendapatan is broader than bukti gaji.

For example, pendapatan could include:

• salary
• freelance income
• business income
• other earnings

That is why bukti pendapatan is common in official contexts: it covers income more generally.

A simple pronunciation guide is:

• Bukti → BOOK-tee
• pendapatan → pen-da-PAH-tan
• itu → EE-too
• lengkap → leng-KAP

Very roughly together:

• BOOK-tee pen-da-PAH-tan EE-too leng-KAP

A few tips:

• Malay pronunciation is usually quite phonetic.
• Stress is not as strong or dramatic as in English.
• Final consonants like the p in lengkap are often unreleased or softer than in English speech.

Yes. Even though the phrase looks singular in English, in real use it can refer to proof of income as a set of supporting documents.

For example, someone might submit:

• payslips
• bank statements
• tax records
• employer letters

Malay often does not force you to mark singular vs plural as clearly as English does. Context usually tells you.

If you want to make plurality clearer, you could say things like:

• dokumen bukti pendapatan itu lengkap = those proof-of-income documents are complete
• semua bukti pendapatan itu lengkap = all that proof of income is complete / all those income-proof documents are complete

So the original sentence can be understood flexibly depending on context.