Vi förnyar mobilabonnemanget förutsatt att månadsavgiften är låg.

Förutsatt att means provided that, as long as, or on condition that. It introduces a condition.

So:

• Vi förnyar mobilabonnemanget förutsatt att månadsavgiften är låg.
• We renew the mobile subscription provided that the monthly fee is low.

It is a bit more formal and stricter than om (if). It suggests a clear condition must be met.

In Swedish, the present tense is often used for future meaning when the context makes the time clear.

So Vi förnyar ... can mean:

• We renew ...
• We are renewing ...
• We will renew ...

In this sentence, the condition makes it sound like a future or policy-like statement: we will renew it, provided that...

If you want to make the future more explicit, you could say:

• Vi kommer att förnya mobilabonnemanget ...

But the original sentence is completely natural.

Swedish normally writes compound nouns as one word.

So mobilabonnemanget is made up of:

• mobil = mobile
• abonnemang = subscription
• -et = the definite ending

So:

• mobilabonnemang = mobile subscription / mobile plan
• mobilabonnemanget = the mobile subscription / the mobile plan

This is very normal in Swedish. English often uses separate words where Swedish uses a compound.

Because abonnemang is a neuter noun, an ett word:

• ett abonnemang = a subscription

The definite singular form of many neuter nouns ends in -et:

• abonnemanget = the subscription

Since the head word of the compound is abonnemang, the whole compound is also neuter:

• ett mobilabonnemang
• mobilabonnemanget

So the ending depends on the grammatical gender of the main noun, not on mobil.

This is another Swedish compound:

• månad = month
• avgift = fee
• månadsavgift = monthly fee

The -s- is a linking sound often used in compounds. It does not mean possession here. It just helps form the compound naturally.

Then -en makes it definite:

• en månadsavgift = a monthly fee
• månadsavgiften = the monthly fee

So the full word is:

• månad + s + avgift + en

Not every compound uses a linking -s-, but many do.

Because they have different grammatical genders.

• en avgift → avgiften
• ett abonnemang → abonnemanget

So:

• månadsavgift is an en word
• mobilabonnemang is an ett word

In Swedish, the last part of a compound decides the gender:

• mobilabonnemang takes its gender from abonnemang
• månadsavgift takes its gender from avgift

That is why the definite endings are different.

The adjective agrees with månadsavgiften, which is singular and an en word.

After är, Swedish uses predicate adjective agreement:

• en word, singular: låg
• ett word, singular: lågt
• plural: låga

So:

• månadsavgiften är låg = the monthly fee is low
• priset är lågt = the price is low
• avgifterna är låga = the fees are low

A very important point: even though månadsavgiften is definite, the predicate adjective is still låg, not låga.

Because this is a subordinate clause introduced by förutsatt att.

In Swedish subordinate clauses, the normal order is:

• subject + verb

So:

• månadsavgiften är låg

This is different from main clauses, where Swedish often follows the V2 rule and the verb comes early.

Compare:

• Main clause: Avgiften är låg.
• Subordinate clause: ... att avgiften är låg

If you put the conditional part first, the main clause changes word order instead:

• Förutsatt att månadsavgiften är låg, förnyar vi mobilabonnemanget.

There, förnyar comes before vi because the sentence begins with another element.

Yes, you often can.

• Vi förnyar mobilabonnemanget om månadsavgiften är låg.

This means roughly We renew the mobile subscription if the monthly fee is low.

The difference is tone:

• om = neutral, ordinary if
• förutsatt att = more formal, more like provided that or on condition that

So both are grammatical, but förutsatt att sounds a bit more official or precise.

Mobilabonnemang is a very normal and natural word. It often means a mobile phone plan or mobile subscription.

Other related words are:

• abonnemang = subscription / plan
• telefonabonnemang = telephone subscription
• mobiltelefonabonnemang = mobile phone subscription

In everyday Swedish, mobilabonnemang is common and idiomatic.

Because Swedish usually puts the definite article at the end of the noun instead of using a separate word like English the.

So:

• abonnemang = subscription
• abonnemanget = the subscription

and

• avgift = fee
• avgiften = the fee

That is why you see:

• mobilabonnemanget
• månadsavgiften

instead of a separate word before the noun.

The sentence breaks down like this:

• Vi = subject
• förnyar = verb
• mobilabonnemanget = object
• förutsatt att månadsavgiften är låg = conditional clause

So the pattern is:

• We renew the mobile subscription, provided that the monthly fee is low.

It is a main clause followed by a subordinate clause that gives the condition.