Missionary monthly payments 24?

I can not find a straight answer to this.

If a missionary starts their mission Jan 18th 2018, and family paid first months payment Jan 1st of 2018, and then the missionary will return home January 23rd 2020, then 24 payments would be through Dec 2019. Do they need to pay for January 2020? Is that considered month 25 for the missionary? Insights appreciated. Family wants to make sure they pay what is expected.

It can be 23 or 25 depending on the details. It all depends on when exactly the missionary entered the MTC and when they left the mission.

It's discussed in this thread.

kreeve wrote:If a missionary starts their mission Jan 18th 2018, and family paid first months payment Jan 1st of 2018, and then the missionary will return home January 23rd 2020, then 24 payments would be through Dec 2019. Do they need to pay for January 2020?

No. The 24 payments are normally all that is expected.

While not exactly technically correct, one way to look at it is that the first January payment covered from January 18th through two-thirds of February, and the 24th payment in December is covering from December 18th through the rest of his mission in January.

Ok, I didn't see the dates. It appears this missionary will have served 24 months and 6 days - not enough to trigger a 25th payment. That threshold would be closer to 14-15 days (half month).

The policy can be found in the Missionary Finances help center article particularly the sections titled 'Charges to the ward checking account' and 'Extensions and Early Releases'. Basically it's 24 payments unless the missionary is released 15 or more days before the 24 month mark or 15 or more days after in which case it's adjusted by one payment one way or the other.