Sofia runs $799 a month for a city-centre one-bedroom. These 2 places are cheaper — from 20% to 31% less. Every figure below comes from the same rent survey on the same day, so the comparisons are consistent rather than stitched together from different months. We lead with what you give up.
$553 vs $799 a month, city-centre one-bedroom
What you give upSame 10% flat tax and new Bulgarian DNV, charming old town, 31% cheaper — much smaller and quieter.
$638 vs $799 a month, city-centre one-bedroom
What you give upBlack Sea coast, same visa and tax, moderately cheaper — highly seasonal, quiet in winter.
Rent is one line of a budget, not the whole thing. A city that is 40% cheaper on rent may not be 40% cheaper to live in once flights, healthcare and tax are counted. Figures are city-centre one-bedroom asking rents, not what you will necessarily pay after negotiating a longer lease.