TSK · Leviticus 25:27

The more years there are, the more you may make its purchase price, and the fewer years there are, the less you must make its purchase price, because he is only selling to you a number of years of produce.

but if he consecrates his field after the jubilee, the priest will calculate the price for him according to the years that are left until the next jubilee year, and it will be deducted from the conversion value.