<prompt> Human: Maybe Im awful at math, maybe Im just dumb, but I need a little bit of help.I get paid bi-weekly, and my GF gets paid twice a month 15th and 31st, and we each put in 650 into the joint account for each of our paychecks. The joint account is being used for Rent, Utilities, Gas for the Car and Groceries. Our budget for shared expenses is 2600 a month, which is where the 650 a paycheck came from.Since shes started her job, I havent had a month where three paychecks land within the same month, until this coming April.Basically, Im under the impression that, since both April and September will contain 3 paychecks, but no other month will ever have less than 2 paychecks, at the end of the year, Ill have put in 1300 more in the joint account than she has.I did the math, and it all checks out, but I still feel like its wrong, some how. I dunno, set me straight PF.  <response>: I dont understand why this is even a question or a problem. If you both need to put in 1300 each per month for expenses... then put in 1300 each per month for expenses.Just hold onto the 650 from the extra paycheck which happens twice per year for those paid bi-weekly. 