Apology Letter For Unmet Deadline

Dear [Name],

I am writing to apologize for not meeting the deadline for [project/task]. I understand that this has caused you a great deal of inconvenience and I am truly sorry for that.

I take full responsibility for not meeting the deadline. I had taken on too much work and was unable to complete the task on time. I should have been more honest with myself and with you about my workload and should have asked for help.

I understand that this has caused you a great deal of frustration and I want to assure you that I am taking steps to ensure that this does not happen again. I have re-evaluated my workload and have reduced the amount of work I am taking on. I have also taken steps to better manage my time and prioritize tasks.

I understand that this is not an adequate excuse and I am truly sorry for my mistake. I hope that you can accept my apology and I will do my best to make sure that this does not happen again.

Sincerely,
[Your Name]