Plus, how can you add earnings to a true-up? From which date would apply those earnings?
Since the plan (we think) is using full-year comp, it doesn't have to make ANY match until after the plan year. If the plan did that, there would be no earnings calculation (provided the deposit was made timely). if you think about it, making the match at the end of the year is just one giant true-up.
Making a match on a per-payroll basis just makes sense for a lot of companies. This way they don't have to write one huge check in January.
So, my without a doubt, take-it-to-the-bank, I guarantee it or your money back, swear on my (insert family member here)'s grave that there is not interest calculation on true-ups.
Ok, I'm not that postive, but I'm pretty sure.