When it is wrong
Finding an underpayment, how far back it goes, correcting it and telling people.
Finding an Underpayment First
The six tests that find most wage errors, why they are worth running on a schedule, and what to do in the first week after one of them returns something.
How Far Back It Goes
Establishing when an error started, why the answer is a data question before it is a legal one, and the three dates that bound the exercise.
Computing What Is Owed
Rebuilding a corrected figure period by period, the six inputs the calculation needs, and why one model beats individual workings.
Telling the People Affected
What a letter about an underpayment has to contain, why explaining the cause matters more than apologising, and the order to tell people in.
What Travels With the Correction
The figures a corrected gross payment changes besides gross pay — accruals, averages, contributions and year-to-date totals — and the order to handle them in.
The One Who Asks, and Those Who Do Not
Why a single pay query should trigger a population check, what a good first response looks like, and the risk of correcting only for the person who complained.
Fixing the Setting, Not the Payment
Why paying what is owed is the smaller half of a correction, the four things that stop a recurrence, and how to find out why a setting was wrong.