If the window tax was tripled in 1797 from 6pence per window per year to 1s6d per year per window, why would anyone block their windows? The modern equivalent is £3.31 per window per year using the national archives calculator. A 14 window house would pay £46.34 per year, hardly a taxing tax. What was the cost of bricking up a window? The tax is so low it hardly seems worth households paying to block their windows at all. Is the national archives calculator wrong? What are your thoughts?