Retiring the 4% Rule A portfolio created with your long-term objectives in mind is crucial as you pursue your dream retirement. Related Content Put It in a Letter A letter of instruction provides additional and more personal information regarding your estate. When Do You Need a Will? When do you need a will? The answer is easy: Right Now. Why do Renters Have to Save More? How much more would retirement cost if you owned your home rather than rented? It could actually be several times less.