Español — Subjunctive in concessive clauses
With aunque, a pesar de que, por más/mucho que and aun cuando, Spanish chooses the mood on purpose: the indicative presents the obstacle as a real, verified fact, while the subjunctive presents it as a hypothesis or as information already shared and set aside. Aunque llueve says it is raining now; Aunque llueva leaves the rain open.
How it works
Use the indicative when the concessive clause states a fact you present as true and verified: Aunque está lloviendo, salgo (it is in fact raining). Use the subjunctive when the fact is hypothetical or when you concede information already shared, setting it aside as irrelevant: Aunque llueva, saldré (rain or not) and Aunque lo sepas, no cambia nada (I grant you know it). Por más/mucho que and aun cuando behave the same way, favouring the subjunctive for effort or hypothesis: Por mucho que grites, no te oirán.
Examples
| Example | Mood and value |
|---|---|
| Aunque está lloviendo, salgo. | Indicative — real fact: it is actually raining, and I go out anyway. |
| Aunque llueva, saldré. | Present subjunctive — hypothesis: whether or not it rains, I will go out. |
| Aunque lo sepas, no cambia nada. | Present subjunctive — conceded, known information set aside as irrelevant. |
| A pesar de que estaba cansado, siguió. | Indicative — verified fact in the past: he was indeed tired, yet kept going. |
| Por más que lo intente, no lo consigue. | Subjunctive — however hard he tries (repeated effort), he does not manage it. |
| Por mucho que grites, no te oirán. | Subjunctive — no matter how much you shout, they will not hear you. |
| Aun cuando tuviera dinero, no lo compraría. | Imperfect subjunctive — remote hypothesis: even if I had money, I would not buy it. |
Good to know
A frequent learner error is treating aunque as always requiring the subjunctive. It does not: Aunque hace frío, no llevo abrigo is correct when the cold is a stated fact. Also note that por muy + adjective + que always takes the subjunctive (Por muy caro que sea, lo compro), and that aun cuando meaning 'even if' pushes toward the subjunctive, while written apart aun cuando... 'even when' can stay in the indicative for real repeated situations.