Im going to do a 15 cake for my friends niece and its a cake for 300 people now im not professional and i do it out of my house so i usually bake the cake a day or two before and im not sure if i can achieve that with this cake itll be a 14,10,6 plus 6 9"s .
so my question is how soon can cakes be baked without jeopardizing the taste?

It won't be too soon unless you're planning to bake a year in advance (and I'm sure you're not needing to consider that). Think about all of the 1st anniversary tiers that are frozen for a year that still taste fine. If wrapped properly, they'll last for months in the freezer.

Hello, usually bake my cakes three or four days before needed. If you wrap them well and brush them with a little simply syrup which will keep the moisture in them. You can freeze them for one or two days, take them out to decorate. This will not jeopardizing the taste at all, just make sure you wrap them well in cling wrap and also with heavy duty foil. I have done this many times and freezing them for a day or two helps them keep well.
good luck, hope this helps

Thank you! you guys were very helpful

i bake my cakes before 4 -5 days and put them in cake keeper in the fridge not in the freezer and its always moist and delicious never heard any complains

You can bake those cakes weeks in advance, if you choose, and freeze the layers, well wrapped.

I try to keep the freezing at less than 30 days and it usually winds up being less than 10 days.

Freezing actually improves the texture of the cake (proven baking science). Refrigeration can contribute to a cake drying out and becoming stale more rapidly (again, proven baking science).

I defrost the layers as I need them. I unwrap them & sit them on a cooling rack. I find that most 2" tall layers take about 2 hours to become "workable".

Rae