Hello,
it allways depends on your calculations and the prevailing circumstances.
All our T/O calculations are based on a 60m rolling T/O-allowance (60m rolling until T/O thrust). However, there are certain circumstances requirering a static T/O(see statemant above).
Nowadays, we do our calculations with a pilots workpad (Laptop), which allways provide your specific stop margin in event of a RTO. So the final decision rests with the PIC considering all prevaivailing circumstances.