Grammar fix
I'll get this
offer to pay
A friendly offer to pay the whole bill yourself rather than splitting it.
expressionB1common
Hear it in context
Notice where the phrase sounds natural.
- Put your wallet away — I'll get this.reaching for the bill
- A: How much do I owe you?
B: Nothing, I'll get this — you can get the next one.café
Fix the pattern
Pattern: I'll get this / I'll get this one
WrongI will pay this all.
RightI'll get this.
The natural offer is 'I'll get this', not 'I will pay this all'.
PatternI'll get this / I'll get this one
Don't confuse it
'I'll get this' = you pay it all; 'go halves' = you each pay half.