Jag behöver fundera en stund innan jag svarar på din fråga om avtalet.

In Swedish, behöva is usually followed directly by the infinitive:

• Jag behöver fundera
• Hon behöver gå
• Vi behöver prata

So att is normally not used here.

This is similar to English need to think, except Swedish leaves out the equivalent of to in this structure.

Fundera means think something over, reflect, or consider. It often suggests that you need a little time to work something out.

Tänka is a broader word meaning think in general.

So in this sentence, fundera is a good choice because the speaker is not just having a thought—they are taking time to consider something before answering.

Compare:

• Jag tänker på dig = I’m thinking about you
• Jag funderar på ditt förslag = I’m considering your proposal

En stund means a while or a moment.

It is a very common expression for a short period of time:

• Vänta en stund = Wait a moment
• Jag ska vila en stund = I’m going to rest for a while

In your sentence, fundera en stund means think for a while.

Notice that Swedish often does not need a separate word for for here. English says for a while, but Swedish can simply say en stund.

Because innan introduces a clause: before I answer.

So the structure is:

• innan
  • subject + verb

Here:

• innan jag svarar = before I answer

You would not use att in this pattern.

Compare:

• innan jag går = before I leave
• innan vi börjar = before we start

This is very normal in Swedish. The present tense is often used for actions that are future in meaning when the context makes the timing clear.

So:

• innan jag svarar literally looks like before I answer / am answering
• but it naturally means before I answer in the future

English does something similar in some time clauses:

• I’ll call you before I leave

  not usually before I will leave

Swedish works the same way here.

In Swedish, svara på is the usual expression for answer when you answer a question, email, letter, etc.

So:

• svara på en fråga = answer a question
• svara på ett mejl = answer an email

The preposition på is required by the verb in this use. It does not translate word-for-word very neatly, so it is best to learn svara på as a unit.

Compare:

• Jag svarar dig can exist, but it is much less common in everyday Swedish for answer your question
• Jag svarar på din fråga is the normal phrasing

In Swedish, a possessive like min, din, hans, hennes, vår usually comes before the noun, and then you normally do not use a separate definite article.

So:

• din fråga = your question
• mitt hus = my house
• vår bil = our car

You do not say:

• den din fråga for this meaning

And frågan din is not the normal neutral way to say your question. It can appear in special stylistic or poetic contexts, but not in standard everyday usage.

Avtalet is the definite form, meaning the contract or the agreement.

Swedish usually marks definiteness by adding an ending to the noun:

• ett avtal = a contract
• avtalet = the contract

So om avtalet means about the contract, probably referring to a specific contract already known in the conversation.

Here it means about the contract.

The word om can mean different things in Swedish, including:

• about
• if

In this sentence, it clearly belongs with fråga:

• din fråga om avtalet = your question about the contract

So om avtalet modifies fråga, not the whole sentence.

Because fråga om något is a very common pattern in Swedish:

• en fråga om pengar = a question about money
• en fråga om tid = a question about time
• en fråga om avtalet = a question about the contract

Also, svara på din fråga is already a complete and natural unit: answer your question. After that, om avtalet most naturally tells us what the question is about.

So the structure is:

• Jag behöver fundera en stund
• innan jag svarar på [din fråga om avtalet]

Innan is a conjunction here, meaning before.

It introduces a subordinate clause:

• innan jag svarar på din fråga om avtalet

In Swedish subordinate clauses, the subject usually comes before the verb in normal order:

• innan jag svarar
• eftersom jag vet
• när vi kommer

So this part has standard clause order.

A useful extra point: if you started the whole sentence with the innan clause, the main clause would then follow normal main-clause inversion:

• Innan jag svarar på din fråga om avtalet, behöver jag fundera en stund.

Notice behöver jag there, not jag behöver.

You could say it, but fundera sounds more natural here.

• fundera en stund = think it over for a while
• tänka en stund = think for a while

Both are understandable, but fundera better matches the idea of needing a little time before giving an answer.

So the original sentence sounds very natural.

It sounds natural and neutral. It works well in both spoken and written Swedish.

It is polite and slightly careful in tone, because the speaker is saying they need time before answering. That makes it especially suitable in work, legal, or professional contexts, which also fits the word avtalet.

A more casual version might be:

• Jag måste tänka lite innan jag svarar på din fråga om avtalet.

But the original sentence is perfectly normal and often a bit smoother.