Bajeti ya mwezi iko tayari.

A natural word-by-word breakdown is:

• bajeti = budget
• ya = of / for
• mwezi = month
• iko = it is
• tayari = ready

So the sentence literally means The budget of the month is ready, and more naturally in English: The monthly budget is ready or The budget for this month is ready.

Ya links two nouns. It often means of or for.

So:

• bajeti ya mwezi = budget of the month / monthly budget

This is a very common Swahili pattern:

• kitabu cha mwanafunzi = the student’s book
• soko la mjini = the town market
• bajeti ya mwezi = the month’s budget

English often uses an adjective like monthly, but Swahili commonly uses this noun-linking structure instead.

The connector changes to agree with the noun that comes before it.
Here, the main noun is bajeti, and bajeti belongs to the noun class that normally takes ya in the singular.

So:

• bajeti ya mwezi = the budget of the month

This agreement system is very important in Swahili. The linking word is not always ya. For example:

• kitabu cha mtoto = the child’s book
• gari la baba = father’s car
• bajeti ya mwezi = monthly budget

Yes, mwezi can mean both month and moon.

Context tells you which meaning is intended. In bajeti ya mwezi, the meaning is clearly month, because a budget of the moon would not make sense in normal conversation.

This kind of meaning overlap is common in many languages.

In this sentence, iko tayari is the natural way to say it is ready.

Here:

• i- = subject marker agreeing with bajeti
• -ko = a form of to be often used for state, presence, or situation

So iko tayari means something like it is in a ready state.

Swahili often uses forms like this with tayari:

• Chakula kiko tayari = The food is ready
• Kazi iko tayari = The work is ready
• Bajeti ya mwezi iko tayari = The monthly budget is ready

Using ni here would usually sound unnatural. Ni is more commonly used for identifying or classifying something, like:

• Huyu ni mwalimu = This is a teacher
• Hiyo ni bajeti = That is a budget

Iko is made of:

• i- = the subject marker for the noun class of bajeti
• -ko = a copular/existential form meaning roughly is, exists, or is present

So iko means it is for this noun class.

You can compare:

• Kitabu kiko mezani = The book is on the table
• Barua iko tayari = The letter is ready
• Bajeti iko tayari = The budget is ready

Even though English just uses is, Swahili chooses different forms depending on grammar and noun class.

Tayari does not usually change to match noun class in the way many adjectives do. It behaves more like an invariable descriptive word.

So you can say:

• chakula kiko tayari = the food is ready
• mradi uko tayari = the project is ready
• bajeti iko tayari = the budget is ready

The agreement is shown in iko, not in tayari.

Bajeti is a borrowed word, ultimately from budget. Swahili has many loanwords, especially for modern, administrative, financial, and technical ideas.

Even though it is borrowed, it behaves like a normal Swahili noun in sentences:

• bajeti ya mwaka = annual budget
• bajeti iko tayari = the budget is ready

This is completely normal in Swahili.

It can often be understood as either one, depending on context.

• bajeti ya mwezi literally = budget of the month
• In natural English, that may become the monthly budget or this month’s budget

If the speaker is talking about a specific current month, English might prefer this month’s budget is ready.
If the speaker means a recurring type of budget, English might prefer the monthly budget is ready.

Swahili leaves that distinction more to context.

Swahili does not usually use articles like English the and a/an.

So bajeti can mean:

• a budget
• the budget

The context tells you which one is meant. In this sentence, English usually translates it as the budget because it sounds like a specific budget already known to the speakers.

The standard order here is very natural:

• Bajeti ya mwezi = the subject
• iko tayari = the predicate

So:

• Bajeti ya mwezi iko tayari

Swahili word order is often fairly flexible for emphasis, but this version is the normal, straightforward one. For a learner, this is the best order to use.

A simple pronunciation guide is:

• ba-JE-ti
• ya
• MWE-zi
• I-ko
• ta-YA-ri

A few helpful notes:

• j sounds like the j in jam
• mw in mwezi is pronounced together, not as two separate syllables
• Swahili vowels are usually clear and pure:
  • a like a in father
  • e like e in bed but often a bit purer
  • i like ee in see
  • o like o in go but shorter/purer
  • u like oo in food

Here are a few related possibilities:

• Bajeti iko tayari. = The budget is ready.
• Bajeti ya mwezi huu iko tayari. = This month’s budget is ready.
• Bajeti ya kila mwezi iko tayari. = The monthly budget is ready.
• Bajeti imekamilika. = The budget is complete.

These are not all identical, but they are useful nearby expressions.