Retired pay gross 4540.00
18.6 years
The following is probably unnecessary since you know how to calculate CRSC (my remarks include some conjecture).
1. Currently you waive 2,275.00; that is one of the CRSC ceilings.
2. You are receiving 1,867.69 presently. The difference is 407.31
3.
Another ceiling is the dollar amount of the longevity portion of retired pay.
4. You mentioned you have 18.6 years; I infer you mean 18 years and six months which is 18.5 years (active duty I presume).
5. 18.5 years x 0.025 = 46.25% longevity multiplier
6. High three is unknown so the longevity portion of retired pay cannot be computed. The DoD disability retirement percentage is also needed.
7. The gross retired pay shown on your DFAS RAS would be helpful; it is found on page one of the DFAS RAS in the upper left of page one. The Retired pay gross 4540.00 you cited seems high based on the amount of the gross retired pay shown on your CRSC statement. The gross on the RAS is the result of high three x DoD disability percentage or longevity multiplier.
In answer to your question:
Based on limited information you provided, you should receive as CRSC
a. The dollar amount of the longevity portion of retired pay
OR
b. The 100% IU rate not to exceed 2,275.
whichever is the lesser.
Ron