Your are helping her to get rid of her lease and not to get a new one. Therefore, it is permissible to lend her money.

I have a non-muslim friend asking me for a loan. She wants to pay off a lease bill for a motor vehicle with this money. After completing the lease she wants to sell off the motor vehicle and repay the loan back to me with that money. I am a sri lankan and in our country there is definitely going to have interest charges. Is it permissible for me to lend her the loan? And if it is not, should I tell her that I cannot lend it to her because ribaa is prohibited in my religion?

Islamic economy |