The Systematic Withdrawal Plan (SWP) is one of the most commonly used and misunderstood methods of structuring a retirement income plan. The potential benefits of such a plan are often overemphasized and the relevant risks understated. As with all retirement income plans, an SWP must be thoroughly considered prior to adopting one. (For financial retirement advice, read Managing Income During Retirement.)

The Basics
The basic tenet of an SWP is that you invest across a broad spectrum of asset classes and withdraw a proportionate amount each month to supplement your income. The assumption is that, over time, the SWP will produce an average rate of return sufficient to supply the needed income as well as an inflation hedge.
The Difficulties
The problem is the average rate of return assumption. Most investors look at a portfolio's average rate of return to determine whether or not they have enough money to retire. The problem is that a retiree is not usually interested in the average but the annual rate of return. It doesn't matter much that the portfolio averaged 8% when, in the first year of retirement, it loses 20%. You've dug yourself a big hole, and it may require a long time to get out.

Another issue, which is not dissimilar to an interest-only strategy, one in which you buy fixed-income investments and live off the interest, is liquidity. In an SWP the investments are generally quite liquid, meaning that they can be sold if the principal sum is needed for an emergency or a large expense. The problem is that, if you've made your income assumption based upon your total sum of assets, then withdrawing a large amount, changes the future needed rate of return.

For example, you retire with $1,000,000 and need a 7% rate of return. You have an unexpected need for capital and you withdraw $50,000.00. Your necessary rate of return increases from 7% to 7.37% (70,000/950,000). Even that slight change, less than .4%, can have a big impact long term. This implies that the investments have to be performing at a higher level than initially expected. As with interest-only securities, SWPs work best for investors with excess investable dollars. That way, if a withdrawal is necessary, or if your rate of return assumption didn't quite work out, you might still be able to maintain your standard of living. (For more retirement investment options, read Individual Retirement Account.)

How to Construct an SWP
SWPs can be constructed a number of ways, and these are not mutually exclusive. One way is through buying individual securities. This is a less simple way of building a SWP, but many investors prefer ownership of individual stocks and bonds to mutual funds. An issue with this approach is that most brokerage firms don't provide a SWP program for individual securities.Depending on your brokerage firm's commission schedule, using provided products helps a retiree diversify holdings, and lowers transactions costs.

A more common way to construct an SWP is with mutual funds. Mutual funds are often able to be sold without large transaction fees (depending on the fund you own and the class shares), and most brokerage firms provide an automatic SWP program. With an automatic SWP program, all you need to do is fill out a form and tell your brokerage firm how much you want to receive each month, and where to take it from, and the sales will occur automatically. This is a very convenient feature that gives investors the feeling of receiving a pension or annuity check.

The problem is that, on auto-pilot, the accounts are sometimes not analyzed properly by the investor to determine if the portfolio is earning a high enough rate of return to maintain the withdrawal rate. The basic fundamentals of a SWP suggest that the rate of investment growth has to exceed the money paid out. It is often only when it becomes obvious that the portfolio is being drawn down more quickly than anticipated that the investor seeks professional help. As with the individual security portfolio, a surplus of cash can help offset the risk.

Different Approaches
Another option is to use an annuity to protect oneself from running out of money. There are many different kinds of annuities, and not all would provide assistant in the case of building an SWP. The type of annuity that may help in an SWP is one that provides a guaranteed minimum withdrawal benefit. With this kind of annuity, the insurance company guarantees a cash flow amount based upon your original investment. If you invested $1,000,000 in an annuity with a GMWB, you would receive payments over the rest of your life at a predetermined rate, usually between 5-7%. Therefore, if the portfolio didn't provide enough return to sustain the cash flow rate and the value of ones investments declined in a bear market, the GMWB would provide regular payments to recoup the initial value of the portfolio. Naturally, you wouldn't put all of your money into this type of annuity - or any investment for that matter, - but this may be a tool useful for investors who are on the cusp and concerned about depleting their assets. (Before you retire, read 5 Retirement Questions Everyone Must Answer.)

A blended approach, if one is stuck on using a SWP, is the right approach. Any of the above mentioned options may be utilized effectively, but the proof is in the pudding. Erroneous assumptions regarding rates of return or inflation can be hazardous to any portfolio. Also, mismanagement or neglect alone can ruin the best laid plan. A SWP is an income planning strategy that is deceptive in its simplicity. The prospects of eroding your portfolio are very high, and it is attention to what's happening in your portfolio that is the true means to preventing a catastrophe.

As mentioned earlier, it is the annual or current rate of return that matters, not the average. Imagine investing that million dollars and needing 7% cash-flow when the market fell by 40% due to a recession. Even in a 50% stock, 50% bond portfolio you can assume your portfolio would be down approximately 20%. So let's say that, in year one, we withdraw $70,000.00 and the portfolio falls by 20%. Our portfolio value would then be reduced to $730,000.00. If in year two, we withdraw $70,000.00 from $730,000.00, we are withdrawing 9.6% of the portfolio, assuming steady equity and bond prices. I'm using a once-a-year withdrawal for this example, and most people withdraw monthly, but you get the picture. I don't know many people anymore who think they can average 10% per year. The recommended percentage assumption for a sustainable withdrawal rate is approximately 4%, leaving room for inflation. And even at 4% you could still end up depleting your portfolio to some degree, after a large decline in the stock markets.

The Bottom Line
SWPs are useful and effective, when handled properly, and can be disastrous when handled improperly. It is best to consider all types of retirement income plans and seek the guidance of a professional in order to truly be confident in your ability to maintain your standard of living, and to ensure you leave a financial legacy to your heirs. (It's never too early to start thinking about retirement. To explore what you need to know, check out Investopedia.com: Retirement.)

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