Indien die sakereis môre begin, gebruik ons die kontantvoorskot.

Because indien introduces a subordinate clause. In Afrikaans, the finite verb usually goes to the end of a subordinate clause.

So:

• Indien die sakereis môre begin
• literally follows the pattern if the business trip tomorrow begins

This is very common after words like indien, as, omdat, and wanneer.

This is because Afrikaans main clauses follow a verb-second pattern.

The first position in the sentence is already taken by the whole subordinate clause:

• Indien die sakereis môre begin

So in the main clause, the finite verb must come next:

• gebruik ons die kontantvoorskot

If you wrote the main clause by itself, it would normally be:

• Ons gebruik die kontantvoorskot.

But after a fronted clause, Afrikaans changes the order to:

• ..., gebruik ons die kontantvoorskot.

This is similar to inversion in some formal English structures, but it is much more regular in Afrikaans.

Afrikaans often uses the present tense to talk about the future when there is a clear time word such as môre.

So:

• môre begin = starts tomorrow
• gebruik ons = we use / will use

You do not need a separate future form here. The time expression already makes the meaning clear.

Indien means if.

It is correct, but it sounds a bit more formal or written than as, which is also very common for if in Afrikaans.

So these are both possible:

• Indien die sakereis môre begin, gebruik ons die kontantvoorskot.
• As die sakereis môre begin, gebruik ons die kontantvoorskot.

The first sounds more formal; the second is often more natural in everyday speech.

Sakereis is a compound noun:

• sake = business
• reis = trip/journey

Together, sakereis means business trip.

Afrikaans makes a lot of compound nouns this way, just like Dutch and German, and often like English too.

Kontantvoorskot is also a compound noun:

• kontant = cash
• voorskot = advance

So kontantvoorskot means cash advance.

In context, it probably refers to money given in advance for expenses, for example before a business trip.

Die is the definite article in Afrikaans, meaning the.

Here it appears before both nouns:

• die sakereis = the business trip
• die kontantvoorskot = the cash advance

Unlike English, Afrikaans has only one common form of the definite article: die. It does not change for gender.

No. Afrikaans verbs do not change form the way English verbs do.

So you get:

• Ek begin
• Jy begin
• Hy begin
• Ons begin

The verb stays begin.

This is one of the simpler parts of Afrikaans grammar for English speakers.

Yes, the comma is normally used after the introductory subordinate clause.

So the standard punctuation is:

• Indien die sakereis môre begin, gebruik ons die kontantvoorskot.

The comma helps separate the if-clause from the main clause.

Here môre means tomorrow.

The circumflex on ô helps show the vowel quality and distinguishes it from other similar-looking forms. In practice, learners should mainly remember that môre is the normal spelling for tomorrow.

You will also see it in greetings such as:

• Goeie môre = Good morning

So context tells you whether it means tomorrow or appears in a greeting.