20. Is there a limit on the amount a candidate can contribute to their own election campaign?

For Parliamentary elections:

Art. 71 – “(8) Candidate electoral funds can be established only at the expenses of: … 2) internal funds of candidate; such funds shall sum up to no more than fifty per cent of the maximum allowed expenses by this Federal Law from candidates’ funds. (9) The maximum sum of all expenses from candidates’ electoral funds shall not exceed 40 million RUB.”

Source: Article 71 (8) and (9), Federal Law on Elections of Deputies to the State Duma of the Federal Assembly of the Russian Federation, 2014

For Presidential elections:

Art. 58 – “(2) Electoral funds of candidates may be formed exclusively out of the sources as follows: 1) candidate’s own funds not exceeding 10 percent of the maximum limit on all the expenses out of the candidate’s electoral fund, as established in accordance with this Federal Law, or 15 percent for the candidates taking part in the repeat voting; … (3) The maximum limit of a candidate’s total expenses out of his electoral fund shall not exceed 400 million rubles.”

Source: Article 58 (2 to 3), Federal Law on the Presidential Elections in the Russian Federation, 2002

Given the mixed electoral system for the Parliamentary elections, there are limits on the amount a candidate can contribute to their own election campaign, both for the political parties which nominated a federal list of candidates, regional branches of political parties in a subject of the Russian Federation as well as for individual candidates running in single-mandate electoral districts.