It is important to note that the associated law that created 72(t) distributions did not define what was to be considered a reasonable interest rate. As such, the guidance from the IRS generally flows from the concept that they will not allow people to circumvent the requirement of substantially equal periodic payments (SEPP) throughout your lifetime by using an unreasonably high interest rate.

72(t) withdrawals setup prior to January, 2003, had some flexibility in the choice of the reasonable rate to use. However, in 2002, the IRS issued new rules stating that only rates less than or equal to 120% of the Federal Mid-Term rate would be considered reasonable. You are now required to use a rate that is less than or equal to 120% of the Federal Mid-Term rate for either of the two months immediately prior to the start of your distribution plan.

• Required minimum distribution method: This is the simplest method for calculating your SEPP, but it also typically produces the lowest payment. It simply takes your current balance and divides it by your single life expectancy or joint life expectancy. Your payment is then recalculated each year with your account balance as of December 31st of the preceding year and your current life expectancy. This is the only method that allows for a payment that will change as your account value changes. Even though this may provide the lowest payment, it may be the best distribution method if you expect wide fluctuations in the value of your account.

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  Fixed amortization method: With this method, the amount to be distributed annually is determined by amortizing your account balance over your single life expectancy, the uniform life expectancy table or joint life expectancy with your oldest named beneficiary.

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  Fixed annuitization method: This method uses an annuity factor to calculate your SEPP. This is one of the most complex methods. The IRS explains it as taking the taxpayer's account balance divided by an annuity factor equal to the present value of an annuity of $1 per month beginning at the taxpayer's age attained in the first distribution year and continuing for the life of the taxpayer. For example, if the annuity factor for a $1 per year annuity for an individual who is 50 years old is 19.087 (assuming an interest rate of 3.8% percent), an individual with a $100,000 account balance would receive an annual distribution of $5,239 ($100,000/19.087 = $5,239). This calculator uses the mortality table published in IRS Revenue Ruling 2002-62, which is a non-sex based mortality table. Please note that your annuitized SEPP is based on your life expectancy only, and is not based on the age of your beneficiary.
  
  In addition, on July 3rd, 2002, the IRS ruled that you could change your distribution type one time without penalty from the Annuitized or Amortized methods to the Required Minimum Distribution method. This would allow account holders the option to move from a fixed payment type to a payment that fluctuates annually with the value of their account. The primary reason for this exception is to allow individuals who have suffered large losses, the option to reduce their distribution to prevent their retirement account from being prematurely depleted. For more information on this important exception please see Revenue Ruling 2002-62 on www.treasury.gov.
  

If payments are changed for any reason other than death or disability before the required distribution period ends, the distributions may be subject to a retroactive application of the Premature Distribution penalty. It is 10% (plus interest) for all years beginning the year such payments commenced and ending the year of the modification. It is important to remember that while 72(t) distributions are not subject to the 10% penalty for early withdrawal, all applicable taxes on the distributions must still be paid. Further, taking any early distributions from a retirement account reduces the amount of money available later during your retirement. Please contact a qualified professional for more information.