Well, our "budget" wasn't a forecast of expenses, it was the total we were allowed to spend based on the 4% SWR strategy.
OK, I understand. Our measurement is based upon different "standards" if you will.
During my days as a minor manager in a major corporation
I was criticized if my budget was exceeded. It was also criticized if it was under budget vs. forecast and interium adjustments of expensed due to new projects (up) or supplier discounts (down).
I guess I retired, but still keep those old practices in place, in my annual retirement tracking for budgets vs. actual expenses.
For instance, my budget measurement of 1/1/2010 - 12/31/2010 was at a 2.2% variance. That included personal ROI, personal rate of inflation (not the governments), and included not only those standard increase items (such as taxes, insurance, etc.) but also some minor "add-on's" (such as a Carbonite subscription for three years).
Also, for DW/me, our measurement against a 4% withdrawl rate would not make sense at this time. We're above 4% (not actually, since DW is still wor*ing, but expected to retire in 2011), but we don't have a lot of our "elder life income sources" yet on-line. Those include three SS sources (me, claiming aginst my DW at age 66), my DW's SS at her FRA, my SS at age 70, and two small pensions for DW at age 65 (2.5 years away). At age 66 (we're the same age) our WD rate against our joint portfolio is forecast at just over 2%. If we were to use that as a "budget", we certainly would be under (as you are, today).
It just seem from my way of accounting
that you had a problem with forecast vs. reality. However, seeing what you have done explains the varience....