Questions & Answers about Si me llamas, te respondo en seguida.
In Spanish, when you talk about a future result that depends on a condition, you normally use the present indicative in both parts:
- Si + present indicative, present indicative / future meaning
- Si me llamas, te respondo en seguida.
- Literally: If you call me, I answer you right away → meaning: If you call me, I’ll answer you right away.
This is standard with si (if), cuando (when), en cuanto (as soon as), etc., when the situation is realistic and possible.
Using the future tense here (Si me llamarás, te responderé) is ungrammatical in Spanish. The future usually appears only in the result clause, and even there, in everyday speech, the present is very common and feels more immediate: te respondo instead of te responderé.
Yes, that is correct Spanish, and it sounds perfectly natural.
Difference in nuance:
Si me llamas, te respondo en seguida.
– Very immediate, almost like a promise or a standing policy: If you call, I (always) answer right away.Si me llamas, te responderé en seguida.
– Slightly more explicitly future-oriented or formal: If you call, I will answer right away.
Both are fine. Using the present in the result clause is just more colloquial and very common in Peninsular Spanish.