prior to the contract finishing(Prior to the contract finishing, Kristopher said, their landlord contacted them about increasing the rent. “He approached us saying that he wanted to raise the rent substantially by basically doubling our rent,” he said. (bc.ctvnews.ca)ART Vancouver)
ahead of time(тж. до истечения срока его действия и т.п. Neither of the two parties shall terminate the contract ahead of time or alter it without mutual consent. Alexander Demidov)