In Russia, Kazakhstan and Belarus
Russia
Banks and microfinance organisations must calculate the PDN (ПДН) before lending (as a rule, from 10,000 ₽) and warn the borrower if it is above 50%. The Bank of Russia limits the share of loans to people with a high PDN, so with a burden above 50% approval is harder to get. Credit card limits are also included in the calculation.
Kazakhstan
Kazakhstan has a similar indicator, the debt burden coefficient (КДН, KDN): a bank must not issue a loan if payments would take more than 50% of the borrower's income.
Sources: Bank of Russia («Банк России»), Bank of Russia: financial literacy portal («Финансовая культура»)