The numbers you should consider for Retirement Planning Purposes real % yield is net of inflation. So a 5% total yield with 3% inflation would be a 2% real % yield.
When you are looking for investments for Retirement Planning Purposes with judicious investments in equities, you should expect long term returns of 8% conservatively. That is based on historical trends. Many good mutual funds have returned better than that. Some as much as 16% for long periods of time. But I doubt that in the future that will be the case unless one looks to overseas and developing markets. Some of those however can hardly be considered conservative. A mixed portfolio of 30-40% debt and 60-70% equities is considered more conservative than one of 100% equities. Interestingly enough, studies have shown that such a portfolio will outperform an all equities portfolio over a long period of time with reduced risk.
That of course is all based on historical data. That data might not be appropriate for future investment returns for Retirement Planning Purposes.
Retirement is one of the most important life events many of us will ever experience. From both a personal and financial perspective, realizing a comfortable retirement is an incredibly extensive process that takes sensible planning and years of persistence. Even once it is reached, managing your retirement is an ongoing responsibility that carries well into one’s golden years.