Offer your thoughts or opinion on the input financial query or topic using your financial background.

Should I always pay my credit at the last day possible to maximize my savings interest?
To avoid nitpicks, i state up front that this answer is applicable to the US; Europeans, Asians, Canadians, etc may well have quite different systems and rules. You have nothing to worry about if you pay off your credit-card statement  in full on the day it is due in timely fashion. On the other hand, if you routinely carry a balance from month to month or have taken out cash advances, then making whatever payment you want to make that month ASAP will save you more in finance charges than you could ever earn on the money in your savings account. But, if you pay off each month's balance in full, then read the fine print about when the payment is due very carefully: it might say that payments received before 5 pm will be posted the same day, or it might say before 3 pm, or before 7 pm EST, or noon PST, etc etc etc. As JoeTaxpayer says, if you can pay on-line with a guaranteed day for the transaction (and you do it before any deadline imposed by the credit-card company), you are fine.  My bank allows me to write "electronic" checks on its website, but a paper check is mailed to the credit-card company. The bank claims that if I specify the due date, they will mail the check enough in advance that the credit-card company will get it by the due date, but do you really trust the USPS to deliver your check by noon, or whatever? Besides the bank will put a hold on that money the day that check is cut. (I haven't bothered to check if the money being held still earns interest or not).  In any case, the bank disclaims all responsibility for the after-effects (late payment fees, finance charges on all purchases, etc) if that paper check is not received on time and so your credit-card account goes to "late payment" status.  Oh, and my bank also wants a monthly fee for its BillPay service (any number  of such "electronic" checks allowed each month). The BillPay service does include payment electronically to local merchants and utilities that have accounts at the bank and have signed up to receive payments electronically. All my credit-card companies allow me to use their website to authorize them to collect the payment that I specify from my bank account(s). I can choose the day, the amount, and which of my bank accounts they will collect the money from, but I must do this every month. Very conveniently, they show a calendar for choosing the date with the due date marked prominently, and as mhoran_psprep's comment points out, the payment can be scheduled well in advance of the date that the payment will actually be made, that is, I don't need to worry about being without Internet access because of travel and thus being unable to login to the credit-card website to make the payment on  the date it is due. I can also sign up for AutoPay which takes afixed amount/minimum payment due/payment in full (whatever I choose)  on the date due, and this will happen month after month after month  with no further action necessary on my part.  With either choice,  it is up to the card company to collect money from my account on the day specified, and if they mess up, they cannot charge late payment fees or finance charge on new purchases etc.  Also, unlike  my bank, there are no fees for this service. It is also worth noting that many people do not like the idea of the credit-card company withdrawing money from their bank account, and so this option is not to everyone's taste.