Anyone that wants a 2018, best wait for the next Ford Employee Pricing + Costco deal. And you'll get a haggle free way of getting ~11% MSRP off. Happens twice a year. Doesn't seem to apply to the high end Mustangs, Raptor yet... questionable whether the new Expedition will be included either.
Don't know what Costco's deal is but here is what FoMoCo offers:
FYI:
A-Plan
Ford's A-Plan is intended for Ford employees. This is often considered to be the best possible deal out of Ford's discounted Plan offers.
How it's calculated: Invoice - Holdback (~3%) - Advertising Fee (698) + $275 program fee
Z-Plan
The Z-Plan is identical to the A-Plan but applies to Ford retirees. Since the programs are so similar, they are frequently referenced together as A/Z Plan.
How it's calculated: Same as A-Plan
X-Plan
The X-Plan is actually two programs that equate to a discount for friends, family, and groups with special affiliations with Ford.
The Ford Partner Recognition X-Plan is essentially a supplier discount that members of certain companies that do business with Ford may qualify for.
The Friends & Neighbors X-Plan is a much broader set that can be used by employees and retirees to sponsor purchases by family and individuals outside their family.
How it's calculated: Invoice - 0.4% + $275 program fee
D-Plan
Ford's D-Plan applies to dealer employees and family members.
How it's calculated: A-Plan + $100