Pay your bills. Christians aren't required to "tithe".
Many people confuse "tithing" which is the old covenant means for support of the religious, judicial and social-support system with new covenant "giving" to support your local church. They aren't the same thing. Under the OT, tithes were payable on farm produce including animals. In the NT church, contributions are to be given as you feel in your heart, for the work of the church and the support of the needy, generously, according to your means, and occasionally, sacrificially.