Messed up my CV dates — how screwed am I?

I recently interviewed for a job in the UK and actually made it through the interview stage (which I didn’t expect, so that part is great). But here’s the issue…

When I was tailoring my CV for this role, I edited it pretty heavily to match the job description. In the process, I accidentally removed one of my previous roles, and that seems to have thrown off the dates across a few other positions.

The problem is, it’s not a small difference:

One role that was about 9 months now looks like 2 years Another that was around 6 months shows as 1 year So overall, multiple roles ended up with incorrect durations

I genuinely didn’t notice at the time (I know… not great), and I already went through the interview using that version.

Now I’m stressing about what happens next:

If they do reference checks, the dates won’t match If HR compares documents later, it might look like I intentionally inflated my experience

I feel like I did well in the interview, which makes this even more frustrating because now I’m worried this could mess things up.

Contact the company, say oops, apologize for not proofreading more carefully, and give them the correct dates.

If the correction comes from you, they can set it aside with just a slight ding for your not being more careful. If they find it themselves, they may suspect you are actively lying to them. I think it's pretty obvious which of these is better for you.