Formula since patch 3.8
With patch 3.8 the formula used in converting the weekly GCW points into rank progress has been changed. The amount of decay in ranks 7+ has been changed too.
Formula used now:
rt = gcw / (1+(gcw / (const  (250 * rank))))  decay
where
rt  is the ranking total gained this week
gcw  is the amount of GCW points you gained this week
decay  is 0 if you are rank 16, 3000 if you are rank 712
const  is 6750 for ranks 412, 7250 for ranks 2 and 3 and 10250 for rank 1 (btw: for ranks 16 this number is the theoretical rank total progress cap)
For officers the rank total is increased according to the following formula:
rt = rt * (((19rank)/(15rank)) + (const3 / (gcw  const4)))
Where const3 and const4 depend on the rank and are (estimation for rank 12!!!)
rank  const3  const4 
7  12200  1950  8  12200  3550  9  12900  5600  10  14100  7800  11  16200  9350  12  18700  11100 
What is known:
There have been significant changes to the GCW points to Rank Progress formula.
The new formula uses diminishing returns from the start instead of at a preset limit. In a diminishing return formula, your first point is worth more than your last. Thus gaining 1000 GCW points in one week will yield less than 500 points in two consecutive weeks.
The Rank decay values for officers are consistent from week to week. The target GCW point values for each rank are in the following table. Any GCW points past these marks will be converted into progress. The cap of 40% rank loss per week remains.
7. 7500
8. 8200
9. 9000
10. 10200
11. 12000
12. 15000
Regarding rank decay, if you are at rank 7, and rank decay causes you to drop back to enlisted rank, your new enlisted rank will be at the highest possible enlisted rank (i.e. rank 6, 99% progress to rank next rank). At this highest possible enlisted rank, if you just earn 1 GCW point during the following week, when the rank update occurs, you will be promoted to rank 7.
Does that mean if I'm say Rank 8, then once I get 8200 points I don't have any decay that week?
Yes
So basicly decay would be 8200 or 40% whatever is lower, after adding my earned gcw points?
No. Whatever GCW points you earn is converted to an equivalent rank progress first. Rank decay is then subtracted from the converted rank progress, and whatever rank progress is left (which could be negative if you did not earn enough GCW points to offset rank decay) is applied to your current rank, % progress to next rank to get a new rank, % progress to next rank.
The 8200 means that if you are at rank 8, then the converted rank progress for 8200 GCW points is enough to completely negate rank decay. If you have fewer than 8200 GCW points, then you will suffer rank decay based on how many points you are short of the 8200 breakeven point. Because the conversion formula is nonlinear, the nearer you get to the 8200 breakeven point, the less and less rank decay you suffer because you did not reach the 8200 breakeven point.
The 40% is an upper limit on the maximum decay that you can suffer because you did not reach the 8200 breakeven point.
What is not (yet) know: The actual formula used in modifying the officers rank progress.
Old Formula prepatch 3.8
Calculation was based on the formula provided by a GameMaster.
While the formula used seems to be correct at this time, it may prove to be wrong later (once players get to the higher ranks) or the actual formula in game may be changed by SOE. I will try to keep this calculator up to date though. Corrections and suggestions are welcome, mail me at swg@activeframe.de
Your rank progress is measured in a linear rank total of 5000 points each rank. Your GCW points are applied to your rank total each Thursday 12pm PDT. The GCW points are converted to a rank progress based on your current rank. The conversion ratio gets worse for higher ranks. At officer ranks a decay is applied to your rank progress each week.
After the removal of the hardcap there is now a softcap that can be passed. The GCW points converted past the soft cap are converted with diminishing returns. The exact formula used beyond the soft cap hasnt been found yet. The calculator uses a approximate formula that is based on current experiences. At the moment I am using the formula progress_over_cap = floor(log10((points_over_cap / 1.1) * 10). That means approximately that you get an additional rank total that equals the number of digits of the GCW points you earned past the soft cap. So you wont get more than 5 additional rank total unless you earn more than 1 Million GCW points.
