Mi jefa dice que el salario llegará el mismo día para todas.

Jefa is the feminine form of jefe, meaning boss. Since the speaker’s boss is a woman, Spanish uses jefa.

• mi jefe = my male boss
• mi jefa = my female boss

This is very common in everyday Spanish.

In Spanish, possessives like mi, tu, su, nuestro, etc. normally replace the article.

So you say:

• mi jefa = my boss
  not
• la mi jefa

This works the same way with most nouns:

• mi casa = my house
• tu coche = your car

Dice que means says that. This is a very common structure for reporting what someone says, thinks, believes, knows, etc.

• Mi jefa dice que... = My boss says that...
• Pedro cree que... = Pedro believes that...
• Ella sabe que... = She knows that...

In Spanish, que is usually needed here, even though English sometimes omits that.

Llegará is the 3rd person singular simple future of llegar:

• llegaré = I will arrive
• llegarás = you will arrive
• llegará = it/he/she will arrive

Here, the subject is el salario, so llegará means will arrive.

In context, this means the salary/pay will come on that day. Spanish often uses llegar with things like money, payments, messages, or products.

Because dice que presents the information as a statement, not as doubt or unreality. After verbs like decir, when you are reporting something as a fact or claim, Spanish normally uses the indicative.

So:

• Mi jefa dice que el salario llegará... = normal, correct

You would expect subjunctive in different kinds of structures, especially with doubt, denial, emotion, or purpose.

For example:

• No creo que llegue hoy = I don’t think it will arrive today

But after dice que, the indicative is the usual choice.

Yes. Literally, el salario llegará means the salary will arrive. In English, that may sound a little unusual, but in Spanish it is natural to talk about money or payments arriving.

Depending on context, English might translate it more naturally as:

• the salary will arrive
• the pay will come in
• the salary will be paid

So the Spanish is completely normal.

Because el salario here refers to salary/pay as a type of payment, not to many separate salaries as individual items.

Spanish often uses the singular in this kind of general statement:

• el salario
• el sueldo
• la paga

Even if several people are involved, the idea can still be singular: each person’s pay will come on the same day.

If you said los salarios, that would sound more like the salaries as multiple separate salaries being discussed explicitly.

El mismo día means the same day.

• día = day
• mismo = same

Mismo agrees with día, which is masculine singular, so it becomes mismo.

Compare:

• el mismo día = the same day
• la misma semana = the same week
• los mismos días = the same days

Todas is feminine plural, so it refers to a group of women, or to a feminine noun understood from context, such as todas las empleadas or todas las trabajadoras.

So:

• para todas = for all of them, where the group is female
• para todos = for all of them, where the group is male or mixed

This sentence suggests that all the people being referred to are women.

Here para todas means for all of them or for everyone in that group. It expresses who this timing applies to.

So the idea is:

• the salary will arrive on the same day for all of them

Using a todas would sound less natural in this sentence. With llegar, a is more associated with a destination or recipient in a more direct sense, while para here fits the meaning of for everyone / applicable to everyone.

Both are correct, but in Spain sueldo is often more common in everyday speech when talking about someone’s pay, especially a regular monthly wage.

• salario = salary/wages, slightly more formal or neutral
• sueldo = pay/salary, very common in everyday conversation

So in Spain, you might also hear:

• Mi jefa dice que el sueldo llegará el mismo día para todas.

That said, salario is still perfectly natural and correct.

They matter a lot.

• llegará has an accent because it is the future form and the stress falls on the last syllable.
• día has an accent to show that í-a is pronounced as two syllables: dí-a.

The accent can also change the grammar:

• llegará = will arrive
• llegara = arrived/were to arrive, an imperfect subjunctive form

So the accent is not optional; it helps show both pronunciation and meaning.