ADHD and Relationships 101: I make promises without thinking, then I can't keep them

Your partner asks for something, and before they have even finished the sentence you say "sure, I'll take care of it." Helping with a move on Saturday, cooking dinner together on Thursday evening, looking into that vacation thing by the end of the month. In that moment you really mean all of it. Then the week slips by. Some of the promises have gone completely out of your head; some you remember but cannot get done in time. And from the other side comes that familiar sentence: "You promised again."

This post is from the ADHD and Relationships 101 series, and I think it answers one of the most asked questions in the series. Making promises without thinking and then not keeping them is one of the things adults with ADHD describe most often in relationships. Behind it there is usually no lack of caring. Several separate mechanisms meet at the same point, and each one has its own remedy.

What happens inside when you say yes

I know this loop best from the work side. When someone asks for something, the "yes" comes out not like a decision but like a reflex. And the moment it leaves your mouth it brings relief too: the other person is pleased, the conversation ends on a sweet note, there is no tension. That relief comes right away. The cost of the promise, though, gets paid later, on another day, in another mood.

I want to make one distinction right at the start. Making promises without thinking is not lying. A person who lies knows, when making the promise, that they will not keep it. Someone with ADHD, on the other hand, sincerely believes at the moment of promising that they will keep it. The problem is not in the intention, but in carrying the intention a week forward.

This distinction matters, because it also determines the solution. If the problem were in the intention, wanting it more would be enough. But you already want it. What is missing is a routine that carries the wanting all the way to the day the promise is due.

Why it happens: four mechanisms pile on top of each other

The definition of ADHD is made up of symptoms of inattention, hyperactivity and impulsivity. The international consensus statement also says these symptoms can go on affecting daily functioning in adulthood (Faraone et al., 2021). When it comes to promises, they show up in four separate places.

The impulsive yes. At the center of ADHD in Barkley's model is inhibition: being able to put a pause between a stimulus and the response to it (Barkley, 2015). When this pause gets shorter, the answer is ready the moment someone asks for something. There is no time left to look at the calendar or think "what else was on that day." Impulsivity is usually associated with risky behavior, but I think this is its quietest and most social form: the yes given without meaning to.

Capacity estimation error. At the moment you promise, you see that week as an empty week. You also calculate how long the task will take according to the best-case scenario. Everyone actually does this. In the studies by Buehler and colleagues, people consistently made optimistic estimates of how long tasks would take; when estimating, they looked at the future scenario more than at their past experience. When participants were asked to connect their estimates to similar past experiences, this optimism disappeared (Buehler et al., 1994). In the glossary this is called the planning fallacy. This study was not done with participants with ADHD. But with ADHD, difficulties in perceiving time can make this bias bigger.

The promise slipping out of your mind. If a promise is not written down somewhere the moment it is made, it exists only in your head. Remembering to do something at a particular moment in the future is one of the things someone with ADHD finds hardest. That is why Barkley describes ADHD not as a problem of knowledge but as a problem of doing what you know at the right moment (Barkley, 2015). You know what you are going to do; that knowledge just does not show up at the right moment.

The distant promise staying faint. Thursday evening's dinner makes you feel nothing on Tuesday. At that point, the work in front of you, your phone, a half-finished thought are all much brighter. The future promise often loses the race against the present stimulus. And when you remember at six on Thursday, it is already too late.

Each of the four can be managed on its own. When they come together, the same scene always plays out: a sincere yes, a silent week and disappointment.

How it looks through your partner's eyes

Your partner does not see inside you; they see the promise and its outcome. A promise broken once is a mishap. A promise broken for the fifth time is a pattern. And patterns easily get attributed to personality: "they don't value me," "their word can't be trusted."

I think the most painful part is this: the moment you said yes was lovely. In that moment your partner felt relieved, made plans, maybe arranged something else around it. When the promise is not kept, what is lost is not only that task but also a hope that was given and then taken back. If you had never promised, the disappointment would have been smaller.

In the study by Eakin and colleagues (2004) with adults with ADHD and their spouses, most of the spouses reported that their partners' symptoms affected their own lives in at least one area, such as household organization, time management or communication, and that they compensated for this in some way. When it comes to promises, compensation looks like this: reminding, making a backup plan, being ready from the start for the promise not to be kept. Over time one side moves into the position of the one who reminds and checks. I described this shift separately in the post ADHD and relationships: invisible labor.

Then there is the wearing down of the apology. The apology that follows each broken promise loses its value after a while. I talk about the other side of this loop in the post I'm tired of constantly apologizing.

Put some distance between the yes and the promise

The first intervention is the simplest and, I think, the most effective: replacing the yes reflex with another reflex. When a request comes, have a ready-made sentence.

• "Let me check my calendar and I'll get back to you in ten minutes."
• "I'd like to, but let me first see what's on that week; I'll tell you this evening."
• "I need to think about this; I'll give you an answer by noon tomorrow."

For small things, ten minutes is enough. For things that affect a weekend, money or someone else's plans, if I were you, I would wait a day. The waiting time is itself a promise, and you need to keep it too. If you said ten minutes, get back to them in ten minutes.

For the first few weeks you may need to use this sentence deliberately, almost as if by rote. For it to replace the impulsive answer, your mouth has to get used to it. Say your partner asks "will you come to brunch with our friends on Saturday?" The old reflex says "of course." The new reflex says "I'd love to come, let me check my stuff on Friday and I'll tell you in the evening." The second answer may sound a little cooler. But it is much more likely to turn into a yes that gets kept.

It also matters to explain this to your partner in advance. Otherwise "I'll check and get back to you" can sound like dodging.

Ask your past about your capacity

I think the most useful finding in Buehler's study is this: tying the estimate to the past wears down the optimism. Before you promise, during that ten-minute wait, ask yourself three questions.

The first: how many of my last three similar promises did I keep? The second: what is already on my calendar this week, and what tasks are there that do not show up on the calendar? Tiredness, travel and recovery time top that list. The third: how long did this task actually take last time?

If you do not trust your own estimate, a rough rule also helps: multiply the time that comes to mind by one and a half, and look at the week not as if nothing unexpected will come up but as if something definitely will. This is not a research finding; it is a margin I am suggesting. The aim is not to be pessimistic but to see your real week.

Write the promise down the moment you make it

A promise kept in your head is doomed to disappear. So the rule is simple: a promise is written down the moment it is made. A single note on your phone, a single list. Every promise should have four things: what, to whom, by when, and what the first step is.

An example line might be: "Thursday dinner, with my partner, Thursday 7:30 pm, first step: write the shopping list on Wednesday evening." Writing the first step matters, because one of the reasons promises are not kept is that it is not clear where a big task starts.

Then tie the promise to a time and a place. In Gollwitzer and Sheeran's (2006) meta-analysis, implementation intentions, which link a goal in the form "if this situation happens, then I will do that," were found to increase goal attainment with an effect between medium and large. These studies are not specific to samples with ADHD, and research in ADHD is limited. But the structure goes straight to ADHD's weak point: it takes the job of remembering out of your head and ties it to a situation. Something like "When the alarm goes off on Thursday at 6 pm, I'll leave work and stop by the store." I explained step by step how to set one up in the post on the if-then plan.

One last thing: once a week, for example on Sunday evening, set aside ten minutes and look at the list. If you see a promise that won't be met, let them know that day.

The language of intention instead of promises

Not everything has to be a firm promise. Where you are not sure, there is an honest language: the language of intention. The language of intention is not dodging; it is stating a real possibility as it is.

Language of promise	Language of intention
"I'll definitely come on Saturday."	"I want to come on Saturday; I'll confirm on Friday evening and text you."
"I'll take care of it this week."	"I'm planning to start this week; I'll tell you on Thursday where it stands."
"Sure, whenever you want."	"Okay, but I need to check my calendar first."
"It won't happen again."	"To keep this from happening again, here's what I'm changing."

I think the last row of the table is the most important. "It won't happen again" is the promise someone with ADHD makes most often and keeps least often. What gets said in its place should not be a vow but a change.

The language of intention has a limit too. If you say everything in the language of intention, your partner may after a while start to think you do not commit to anything. So use the word "promise" rarely and with weight. Making a few real promises a month and keeping all of them builds much more trust than making ten promises a week and keeping half.

When you realize you can't keep it

Despite all this structure, some promises will not be met. Then there is only one rule: let them know early. The moment you notice, without leaving it to the last day. And offer a concrete alternative alongside it.

An example message: "I promised you Thursday dinner. I've just realized I won't manage it this week. Shall we do it Saturday at noon? I'll get the groceries." There is next to no apology in this message, but there is responsibility. I think that is the right ratio.

What hurts most is not failing to keep the promise but staying silent. Saying nothing as the day comes and goes, hoping "maybe it won't matter." Your partner experiences this as heavier than the broken promise itself, because now it no longer looks like forgetting but like hiding. I also talk about how trust wears down in the post I make sudden decisions and my partner can't trust me.

Writing a short agreement for the two of you at a calm moment also helps. As an example:

Our promise agreement: For big requests we don't expect an immediate yes; the answer comes by the next day at the latest. Every promise made gets written down the same day. A promise that turns out not to be keepable gets flagged, with a new suggestion, on the day this is noticed. Reminding is the list's job, not the partner's. Once a month we look together at whether this agreement is working.

How to explain it to your partner

Have this conversation not on the day a promise was broken, but when things are calm. An explanation given in the middle of a fight sounds like self-defense.

You could say things like:

"When I promise you something, I really mean it. The problem doesn't come up in that moment but afterward: either I miscalculate my capacity or the promise slips out of my mind."

"I'm not saying this as an excuse. I also want to tell you what I'm going to change."

"From now on, sometimes I won't say yes right away. When I say 'I'll check and get back to you,' I'm not dodging; I want to be sure I can keep my word."

"I don't want you to remind me. The list is my responsibility. But if something goes wrong, I need to be the one who says so, before you do."

Change has to follow right behind the explanation. If you only explain, your partner starts hearing it as the excuse for the next broken promise. There is more on how you can explain ADHD in general in the post on explaining your ADHD to your partner. If your partner says "you never change," I talk about what lies behind that sentence in this post.

When to get help

If every conversation turns into a list of the past because of broken promises and you are both worn out, couples therapy can be a good middle ground. If the same pattern also carries on at work, in your friendships and in the promises you make to yourself, talking with a doctor or therapist who knows ADHD is also worth considering.

What stays with me

As I see it, the heart of this topic is this: trust is built not by the number of promises made but by the proportion that are kept. The biggest gain for someone with ADHD in a relationship is not making more promises, but making fewer, real ones. At first glance this looks like a step back. I think it is the opposite.

Not saying yes right away may surprise your partner for a while. But six months later, when they see that you really do get back to them when you say "I'll check and tell you," and that you really do it when you say "I promise," that word starts to carry meaning again. It is not possible to change this all at once. Every small promise kept lays down a stone.

I would like you to look at yourself with the same compassion. Making promises without thinking is a kind-hearted reflex. You want to please the other person, to be there for them. You do not need to lose that wish. You only need to learn to write it down the moment you make it and to see what your week really looks like.