Originally Posted by
OPebble
Does this apply if you are on a IB branded and sold flight rather than a BA codeshare on IB metal?
Which part? The tier points/miles or using the calculator, or both?
All IB business class fares earn TPs. I have booked with Iberia the lowest business class price and received tier points. AFAIK all oneworld business classes are tier-point earning. It's just the lowest economy fares that don't, and of course AA flights across the pond.