Kadar tarif tertentu digunakan untuk akaun ini.

In Malay, adjectives usually come after the noun they describe.

So:

• kadar tarif tertentu = a certain/specific tariff rate
• literally: rate tariff specific

This is normal Malay word order.
A few modifiers can come before the noun, but ordinary descriptive words like tertentu usually follow it.

Digunakan is a passive form of the verb gunakan (to use / to apply).

• guna = use
• gunakan = use/apply something
• digunakan = is used / is applied

The prefix di- is a very common way to make a passive verb in Malay.

So:

• Kadar tarif tertentu digunakan...
  = A certain tariff rate is used/applied...

This kind of passive is especially common in formal, official, or written Malay.

Malay often uses the passive when the focus is on the thing affected rather than on who does the action.

Here, the important information is the tariff rate, not who applies it. So the passive sounds natural:

• Kadar tarif tertentu digunakan untuk akaun ini.
  = A certain tariff rate is applied to this account.

An active version would need an agent, such as a company or system, and would shift the focus.

Untuk usually means for.

In this sentence:

• digunakan untuk akaun ini
  = used/applied for this account

So untuk links the action to the account it concerns.

Depending on context, untuk can also mean to or express purpose, but here it simply means for.

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

So:

• akaun ini = this account
• rumah itu = that house

This is the standard pattern.

Yes. Akaun is the standard Malay form of account.

Many modern Malay words, especially in business, finance, and technology, are borrowed or adapted from English. The spelling is adjusted to fit Malay pronunciation and spelling conventions.

So:

• account → akaun

It can feel slightly repetitive to an English speaker, because:

• kadar = rate
• tarif = tariff / tariff charge

Together, kadar tarif means something like tariff rate. This kind of noun pairing is common in formal or administrative Malay.

It is not wrong, but it is quite formal and bureaucratic in tone. In some contexts, people might also simply say:

• tarif tertentu
• kadar tertentu

depending on what exactly they want to emphasize.

In this sentence, applied is usually the more natural English translation.

Literal meaning:

• digunakan = is used

But in administrative, billing, or technical contexts, Malay often uses digunakan where English would prefer:

• is applied
• applies

So this sentence is naturally understood as something like:

• A specific tariff rate is applied to this account.
• Specific tariff rates apply to this account.

Malay does not normally use articles like a, an, or the.

That means a noun like akaun can mean:

• an account
• the account
• sometimes just account

The exact meaning comes from context.

Here, akaun ini clearly means this account, so no article is needed.

Malay often does not mark plural unless it needs to.

So a noun can sometimes be singular or plural depending on context.

In this sentence, kadar tarif tertentu looks grammatically singular, but in translation English may sometimes use a plural idea if that sounds more natural in context, especially in official wording.

If Malay wants to clearly mark plurality, it can use reduplication or other wording, but often it simply leaves number understood from the situation.

Grammatically, you could form that sentence, but it would usually sound less natural for this meaning.

• Akaun ini menggunakan kadar tarif tertentu
  literally suggests This account uses a certain tariff rate

That makes the account sound like the doer of the action, which is odd.

The passive version is better because the rate is something applied to the account:

• Kadar tarif tertentu digunakan untuk akaun ini

That is much more natural in formal usage.

Yes, depending on context. This sentence is understandable and formal, but other versions may sound more idiomatic in billing or customer-service language, for example:

• Tarif tertentu dikenakan pada akaun ini.
  = A certain tariff is charged on this account.

• Kadar tertentu dikenakan untuk akaun ini.
  = A certain rate is charged for this account.

• Tarif tertentu terpakai untuk akaun ini.
  = A certain tariff applies to this account.

So your sentence is fine, but dikenakan or terpakai may sound more natural in some real-world contexts.

The structure is:

• Kadar tarif tertentu = noun phrase
• digunakan = passive verb
• untuk akaun ini = prepositional phrase

So the pattern is roughly:

[noun phrase] + [passive verb] + [for + noun phrase]

In a very literal breakdown:

• Kadar = rate
• tarif = tariff
• tertentu = certain/specific
• digunakan = is used / is applied
• untuk = for
• akaun ini = this account

This kind of structure is especially common in formal written Malay.