12 month car leases are rare. Car manufacturers have occasionally tried 12-month and 18-month leases, but usually discontinue them when they find that there’s little interest.
Some lease finance companies will entertain such short leases if requested by customers. However, most are not interested in the relatively low investment returns of a short lease, or the relatively high administrative costs — when compared to longer leases.
Because there are no industry-wide residual value guides for 12-month leases or 18 month leases, residuals tend to be very conservative (low), which means monthly payments will be higher than might be expected. People who are interested in a short-term lease may have other options. See 1-Year Car Lease for more details.