First time poster long time lurker. My husband and I are early 30's DINKS living in Nevada with relatively high incomes. After two years of diligently working to pay off student loans ($78,000) and several car and personal loans (~$25,000) we are finally non-mortgage debt free. We are fully maxing out our 401K's and hope to reach FIRE by mid-40's. My question is regarding compound interest and having multiple accounts (401K, Roth, and taxable accounts). I work for a company that allows me to put in an additional $25,000 a year in my after tax 401K for a total of $53,000 a year in mine/company investment. Is it smarter put the money that was going towards debt to into this account because of the power of compounding interest and then at FIRE do a backdoor Roth conversion or put all the extra money into a taxable account that we have access to at all times. I know this may seem a little vague but the main thing I am trying to understand is does compounding provide a larger return the more money in an account or is it the same no matter how many accounts you have with smaller balances?