Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Do I pay a zero % loan before another to clear both loans faster?
Wow, you guys get really cheap finance. here a mortage is 5.5 - 9% and car loans about 15 - 20%. Anyway back to the question. The rule is reduce the largest interest rate first ("the most expensive money"). For 0% loans, you should try to never pay it off, it's literally "free money" so just pay only the absolute minimum on 0% loans.  Pass it to your estate, and try to get your kids to do the same.  In fact if you have 11,000 and a $20,000 @ 0% loan and you have the option, you're better to put the 11,000 into a safe investment system that returns > 0% and just use the interest to pay off the $20k. The method of paying off the numerically smallest debt first, called "snowballing", is generally aimed at the general public, and for when you can't make much progress wekk to week.  Thus it is best to get the lowest hanging fruit that shows progress, than to try and have years worth of hard discipline just to make a tiny progress.  It's called snowballing, because after paying off that first debt, you keep your lifestyle the same and put the freed up money on as extra payments to the next target.  Generally this is only worth while if (1) you have poor discipline, (2) the interest gap isn't too disparate (eg 5% and 25%, it is far better to pay off the 25%, (3) you don't go out and immediately renew the lower debt.  Also as mentioned, snowballing is aimed at small regular payments.  You can do it with a lump sum, but honestly for a lump sum you can get better return taking it off the most expensive interest rate first (as the discipline issue doesn't apply). Another consideration is put it off the most renewable finance.  Paying off your car... so your car's paid off.  If you have an emergency, redrawing on that asset means a new loan.  But if you put it off the house (conditional on interest rates not being to dissimilar) it means you can often redraw some or all of the money if you have an emergency.  This can often be better than paying down the car, and then having to pay application fees to get a new unsecured loan.   Many modern banks actually use "mortgage offsetting" which allows them to do this - you can keep your lump sum in a standard (or even fixed term) and the value of it is deducted "as if" you'd paid it off your mortgage.  So you get the benefit without the commitment.  The bank is contracted for the length of the mortgage to a third party financier, so they really don't want you to change your end of the arrangement.  And there is the hope you might spend it to ;) giving them a few more dollars.  But this can be very helpful arragement, especially if you're financing stuff, because it keeps the mortgage costs down, but makes you look liquid for your investment borrowing.