22. Is there a limit on in-kind donations to candidates?

156.2. Election funds of candidates and registered candidates nominated for a single-mandate constituency may be organized from the following financial resources: [...]

156.2.4. voluntary donations by citizens or legal entities in respective amounts of no more than 3,000 and 50,000 manats;

Source: Article 156.2, Election Code of the Republic of Azerbaijan, 2003 (amended 2017)

191.2. Election funds of presidential candidates shall be formed only from the following financial sources: [...]

191.2.3. voluntary donations of citizens and legal entities which may not exceed 3,000 and 50,000 manats respectively.

Source: Article 156.2, Election Code of the Republic of Azerbaijan, 2003 (amended 2017)

225.1. Election funds of candidates for municipality membership may be formed from the following financial resources: [...]

225.1.4. voluntary donations from citizens not exceeding 500 manats.

225.1.5. voluntary donations of legal entities that are:

• not more than 10,000 manats - for candidates for membership of a municipality mentioned in Article 215.1.1.;

• for candidates for membership of a municipality mentioned in Article 215.1.2, may .not exceed 7,500 manats;

• for candidates for membership of a municipality mentioned in Article 215.1.3, may not exceed 3,750 manats.;

• for candidates for membership of a municipality mentioned in Article 215.1.4, may not exceed 2,500 manats;

• for candidates for membership of a municipality mentioned in Article 215.1.5, may not exceed 1,250 manats;

• for candidates for membership of a municipality mentioned in Article 215.1.6, may not exceed 750 manats;

Source: Article 225.1, Election Code of the Republic of Azerbaijan, 2003 (amended 2017)

90.2. The following shall be prohibited from rendering voluntary donations and assistance in kind or services to election funds of candidates, registered candidates, political parties, blocs of political parties, and referendum campaign groups:

90.2.1. Foreign countries and foreign legal entities;

90.2.2. Foreign citizens;

90.2.3. Stateless persons;

90.2.4. Citizens under the age of 18;

90.2.5. Legal entities of the Republic of Azerbaijan, of which more than 30% of the charter (property) capital belongs to persons mentioned in Articles 90.2.1, 90.2.2 and 90.2.3 of this Code on the day of official publication of the decision to hold elections;

90.2.6. International organizations and international social movements;

90.2.7. State bodies and municipalities;

90.2.8. State and municipal organizations and offices;

90.2.9. Legal entities, of which more than 30% of the charter capital belongs to the state or a municipality on the day of the official publication of the decision to hold elections;

90.2.10. Military units;

90.2.11. Charitable organizations, religious associations, institutions and organizations; and

90.2.12. Anonymous donors who do not provide any information or misinform on one of the following items:

Source: Article 90.2, Election Code of the Republic of Azerbaijan, 2003 (amended 2017)

Donation limit for private persons applies.  The Election Code does not mention in-kind donation at all, except article 90.2 where are listed entities which are prohibited from "assistance in kind or services to election funds".