I'm perplexed, House Blend. In my
I already did that. Either you didn't realize it, or I'm misunderstanding your question.
Here is the table from that post again. To hopefully make it clearer, I've expanded the headings to indicate that "Pre Tax" also refers to the Roth withdrawal case (since we're assuming there is no tax in that case) and "After Tax" refers to the Traditional IRA withdrawal case with taxes considered. I've also added columns showing the cumulative cash flows and the difference in Internal Rates of Return (IRR).
Code: Select all
62 (20,000) (20,000) (21,907) (21,907)
63 (20,000) (40,000) (21,907) (43,814)
64 (20,000) (60,000) (21,907) (65,721)
65 (20,000) (80,000) (21,907) (87,628)
66 (20,000) (100,000) (21,907) (109,535)
67 (20,000) (120,000) (21,907) (131,442)
68 (20,000) (140,000) (21,907) (153,349)
69 (20,000) (160,000) (21,907) (175,256)
70 15,200 (144,800) 19,524 (155,732)
71 15,200 (129,600) 19,524 (136,208)
72 15,200 (114,400) 19,524 (116,684)
73 15,200 (99,200) 19,524 (97,160)
74 15,200 (84,000) 19,524 (77,636)
75 15,200 (68,800) 19,524 (58,112)
76 15,200 (53,600) 19,524 (38,588)
77 15,200 (38,400) 19,524 (19,064)
78 15,200 (23,200) (1.8%) 19,524 460 0.0% 1.9%
79 15,200 (8,000) (0.6%) 19,524 19,984 1.2% 1.8%
80 15,200 7,200 0.5% 19,524 39,508 2.2% 1.7%
81 15,200 22,400 1.3% 19,524 59,032 3.0% 1.7%
82 15,200 37,600 2.0% 19,524 78,556 3.6% 1.6%
83 15,200 52,800 2.7% 19,524 98,080 4.2% 1.5%
84 15,200 68,000 3.2% 19,524 117,604 4.7% 1.5%
85 15,200 83,200 3.6% 19,524 137,128 5.1% 1.5%
86 15,200 98,400 4.0% 19,524 156,652 5.5% 1.4%
87 15,200 113,600 4.4% 19,524 176,176 5.8% 1.4%
88 15,200 128,800 4.7% 19,524 195,700 6.0% 1.4%
89 15,200 144,000 4.9% 19,524 215,224 6.3% 1.3%
90 15,200 159,200 5.2% 19,524 234,748 6.5% 1.3%
91 15,201 174,401 5.4% 19,524 254,272 6.7% 1.3%
92 15,202 189,603 5.6% 19,524 273,796 6.8% 1.3%
93 15,203 204,806 5.7% 19,524 293,320 7.0% 1.3%
94 15,204 220,010 5.9% 19,524 312,844 7.1% 1.2%
95 15,205 235,215 6.0% 19,524 332,368 7.2% 1.2%
96 15,206 250,421 6.1% 19,524 351,892 7.3% 1.2%
97 15,207 265,628 6.2% 19,524 371,416 7.4% 1.2%
98 15,208 280,836 6.3% 19,524 390,940 7.5% 1.2%
99 15,209 296,045 6.4% 19,524 410,464 7.6% 1.2%
100 15,210 311,255 6.5% 19,524 429,988 7.6% 1.2%
Let me explain the columns. (Refer to my
Since the Pre Tax & Roth case's IRR is smaller for every life expectancy beginning with age 78, I'd say delaying is not as advantageous as in the TIRA After Tax case. (It would only be "better" -- i.e., not as bad -- if one died before age 73 or so.)
* I'd been expecting you to comment, House Blend, on the astounding result (at least it astounded me!) that when funding a $50,000 after tax income with the $20,000 of SS, the federal tax is $5,095; but when funding it with $35,200 of SS, the tax is only $771. In other words, postponing the start of SS reduces one's federal tax over $4,000 every year beginning at age 70. I thought you might ask about the effect on my analysis of the underlined part of the following: