-아/어도 vs -더라도: What Is the Difference?

-아/어도 vs -더라도 is the choice between two Korean endings that both mean "even if" or "even though". The first, -아/어도, is the neutral ending that works for facts and assumptions. The second, -더라도, is a firmer hypothetical: the speaker imagines a situation and says the result will not change.

Key facts

• Both endings attach to a verb or adjective stem and join two clauses: the "even if" situation first, the unchanged result second.
• -아/어도 follows vowel harmony; -더라도 attaches to the bare stem.
• Level: B1. This is an editorial estimate based on common textbook order, not an official list.

What you'll learn

• Say in one sentence how the two endings differ.
• Decide whether a sentence describes a fact or an imagined case.
• Build both endings correctly, including with 하다 and ㅂ irregular verbs.
• Avoid the errors that learners make most often.

Before you start, it helps to know how each ending is built. The full rules are in the lessons on -아/어도 and -더라도. Estimated time: 15 minutes.

What Is the Difference between -아/어도 and -더라도?

The difference is how firmly the speaker imagines the situation. -아/어도 simply says "even if", with no extra weight. -더라도 sets the situation up as an assumption and says the result will stay the same, which gives the sentence a firmer, more deliberate tone.

Here is the smallest pair. Both sentences are about rain, and both are correct.

-아/어도: 비가 와도 갈게요. (biga wado galgeyo.) means "I'll go even if it rains." The speaker states the plan in a neutral way.

-더라도: 비가 오더라도 갈게요. (biga odeorado galgeyo.) means "Even if it were to rain, I'll go." The speaker imagines the rain as a case to push through, and the promise sounds firmer.

The key point: in a promise like this, the two sentences are interchangeable in grammar, and the difference is tone. They stop being interchangeable for facts that really happened, as the table below shows.

-아/어도 vs -더라도: Side-by-Side Table

The table compares the two endings on the points that decide most choices. Each row is a test for your own sentence.

One row decides most test questions. A real fact needs -아/어도, and an imagined case may take either ending. The next sections show each ending at work.

When Do You Use -아/어도?

You use -아/어도 when you say "even if" or "even though" in a neutral way, whether the situation is real or imagined. It has three main jobs.

1. Habits and regular facts. 눈이 와도 학교에 가요. (nuni wado hakgyoe gayo.) means "I go to school even when it snows." The snow is a normal event, and the result stays the same.
2. After 아무리 ("however much"). 아무리 바빠도 아침은 먹어요. (amuri bappado achimeun meogeoyo.) means "However busy I am, I eat breakfast." Say 아침은 as [아치믄].
3. Past facts. 어제 늦게 잤어도 일찍 일어났어요. (eoje neutge jasseodo iljjik ireonasseoyo.) means "Even though I went to bed late yesterday, I got up early." Here -았/었 sits inside the clause. Say 잤어도 as [자써도].

How the form is built: take the stem and add 아도 if the last vowel is ㅏ or ㅗ, and 어도 for every other vowel. 오다 gives 와도, 먹다 gives 먹어도, 바쁘다 gives 바빠도, 힘들다 gives 힘들어도, 어렵다 gives 어려워도, and 하다 gives 해도. It is the same 아/어 form as in 와서, with 서 replaced by 도. The same ending appears in the permission pattern -아/어도 되다.

When Do You Use -더라도?

You use -더라도 when you imagine a situation and say the result will not change, usually to promise, advise or encourage. It has four main jobs.

1. Advice about an imagined case. 설령 실패하더라도 포기하지 마세요. (seollyeong silpaehadeorado pogihaji maseyo.) Say 설령 as [설령]; the double ㄹ is romanized ll. means "Even if you fail, do not give up." 설령 means "even supposing" and pairs naturally with -더라도.
2. Encouragement. 힘들더라도 끝까지 해 보세요. (himdeuldeorado kkeutkkaji hae boseyo.) means "Even if it is hard, try to the end." Say 끝까지 as [끋까지].
3. A request with a condition. 늦더라도 꼭 오세요. (neutdeorado kkok oseyo.) means "Even if you are late, please come." Say 늦더라도 as [늗떠라도].
4. A firm plan. 내일 눈이 오더라도 출발할 거예요. (naeil nuni odeorado chulbalhal geoyeyo.) means "Even if it snows tomorrow, we will leave." Say 출발할 거예요 as [출발할꺼예요].

How the form is built: add 더라도 to the bare stem, with no change. 오다 gives 오더라도, 늦다 gives 늦더라도, 하다 gives 하더라도, and 힘들다 keeps its ㄹ: 힘들더라도. A ㅂ irregular verb does not change before 더라도 either: 어렵더라도, not 어려우더라도. So the ending is simpler to build than -아/어도, because vowel harmony and irregular changes do not apply.

Can You Use Both in the Same Sentence?

You can use both endings in one sentence, and in many promises either one works. When both fit, the choice is about tone. 아무리 어려워도 포기하지 않을 거예요 and 아무리 어렵더라도 포기하지 않을 거예요 both mean "However hard it is, I will not give up." The second one sounds a little more solemn. Say 포기하지 않을 거예요 as [포기하지 아늘꺼예요].

A longer sentence can hold one ending for each job. 피곤해도 운동하고, 내일 비가 오더라도 갈 거예요 means "I exercise even when I'm tired, and I'll go even if it rains tomorrow." The first clause reports a habit, and the second one imagines a case.

The limit of this page: the ending -았/었더라도 also exists, for imagined past situations such as "even if it had been so". It is covered in the full -더라도 lesson and is not needed for the rule below.

Which One Should You Pick? a Simple Rule of Thumb

Pick the ending by asking about the situation, using these questions in order.

1. Did the situation really happen or does it really happen? Use -아/어도, with -았/었 for the past.
2. Is it an imagined case, and do you want a neutral tone? Use -아/어도.
3. Is it an imagined case, and do you want to sound firm, serious or determined? Use -더라도.
4. Do you want to say "even though" about a fact you already know? Use -아/어도 or look at -(으)ㄴ/는데도, which is built for facts.

You'll know the rule works when you can explain why 어제 비가 오더라도 갔어요 sounds unnatural for a single past event: the rain really happened, so it is not an assumption.

The rule is a teaching tool, and it is not a law of Korean. Native speakers also use -더라도 in some habit-like sentences with 아무리, and the border between "fact" and "assumption" is not always sharp. When in doubt, choose -아/어도, which is the safe neutral option.

What Mistakes Do Learners Make with These Two?

Learners make four mistakes with this pair, and each has a one-line fix.

1. Using -더라도 for a real past event. Learners often say 어제 비가 오더라도 갔어요 for "I went even though it rained yesterday". Actually -더라도 sets up an assumption, so it sounds odd for a plain past fact. Use 어제 비가 왔어도 갔어요.
2. Adding vowel harmony to -더라도. Learners often build 오아더라도 or 와더라도. Actually -더라도 attaches to the bare stem: 오더라도.
3. Changing ㅂ irregular verbs before -더라도. Learners often write 어려우더라도. Actually the ㅂ changes only before a vowel, so -더라도 keeps the stem: 어렵더라도.
4. Treating -더라도 as a more polite -아/어도. Learners often think -더라도 is a politeness upgrade. Actually it adds firmness and a hypothetical feeling, not politeness. Politeness comes from the final ending, such as -요 or -습니다.

Practice: Choose the Right Pattern

These exercises check the outcome of this page: choosing between the two endings in a new sentence and explaining the rule. Try each one before reading the answers.

Exercise 1: Choose the ending. 눈이 __ 학교에 가요. (I go to school even when it snows.)

Exercise 2: Choose the ending. 설령 실패__ 포기하지 마세요.

Exercise 3: Fix the error. 어제 비가 오더라도 갔어요.

Exercise 4: Build the form. Add -더라도 to 힘들다.

Exercise 5: Translate. "Even if you are busy, please call." (busy = 바쁘다; call = 전화해 주세요)

Answer Key

• Exercise 1: 눈이 와도 학교에 가요. A regular fact takes -아/어도.
• Exercise 2: 설령 실패하더라도 포기하지 마세요. The imagined failure and the word 설령 point to -더라도.
• Exercise 3: 어제 비가 왔어도 갔어요. The rain really happened, so use -았/었어도.
• Exercise 4: 힘들더라도. Add 더라도 to the bare stem 힘들, and the ㄹ stays.
• Exercise 5: 바빠도 전화해 주세요. A neutral request takes -아/어도: 바쁘다 gives 바빠도. -더라도 (바쁘더라도) would also be correct and sounds firmer.

If you missed Exercise 3, reread the fact-versus-assumption row in the table. The next section shows where to go from here.

What Should You Learn Next?

The fastest way to firm up this pair is to read the two lessons it compares: -아/어도 and -더라도. Then look at -(으)ㄴ/는데도, the ending for "even though" about facts, and its comparison page -(으)ㄴ/는데도 vs -지만.

The -아/어도 ending also builds a common permission pattern. If you have not met it, read -아/어도 되다 and its comparison page -아/어도 되다 vs -(으)면 되다. -아/어도 is usually taught around A2 and -더라도 around B1, so this pair sits on the intermediate grammar list, and this pair is one of many in the confusing grammar compared hub.

What this page does not cover. It does not cover -았/었더라도 in depth, the written-style concession endings, or the permission pattern -아/어도 되다. Each of those has its own lesson.

In short, -아/어도 vs -더라도 comes down to one question: is the situation a fact or an imagined case that you want to push through?

Frequently Asked Questions

What is the difference between -아/어도 and -더라도? Both mean "even if". -아/어도 is the neutral, everyday ending and can describe real facts or assumptions. -더라도 is a firmer hypothetical: the speaker imagines a situation and says the result will not change. It is common with promises, advice and determination.

Can I always replace -아/어도 with -더라도? No. For something that really happened or happens, use -아/어도: 어제 늦게 잤어도 일찍 일어났어요. -더라도 needs an assumed or imagined situation, so it does not fit a plain report of fact. In the other direction, -아/어도 can usually replace -더라도 with only a small loss of firmness.

Which one sounds more natural in speech? -아/어도 is the more frequent form in everyday talk. -더라도 is also used in speech, mainly for advice and resolve, such as 늦더라도 꼭 오세요. It sounds a little more deliberate and appears often in writing, speeches and essays, so it can feel more serious than -아/어도.

Which one appears more often on TOPIK? This site has no official frequency count to cite. -아/어도 is usually taught at beginner level, which TOPIK I covers, and -더라도 at intermediate level. Test items on this pair usually give a hypothetical or a fact and ask which ending fits, so the fact-versus-assumption rule on this page is the skill to practise.

What is the quickest rule to remember? Ask whether the situation is a real fact or an imagined one. A real fact needs -아/어도. An imagined situation can take either ending, and -더라도 adds determination or emphasis. For promises like "even if it is hard, I'll do it", -더라도 is the more natural pick.

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