The relevant rules are in 2019/2020 UEFA Champions League Regulations:
Article 23 Confirmation of fixtures and automatic reversals
23.01 The venues, dates (in accordance with the calendar in Annex C) and kick-off times
for all qualifying matches except those in the preliminary round are fixed by the
home clubs and must be confirmed to the UEFA ...
The English Premier League is guaranteed at least four, and may earn a total of five, places at the next Champions League group stage.
They are assigned in the following priority order.
The previous Champions League winner
The previous Europa League winner
The first-place team in the Premier League
The second-place team in the Premier League
@Martin shared a great reference in the comments.
The association ranking based on the UEFA country coefficients is used to determine the number of participating teams for each association...
It goes on...
For the 2019–20 UEFA Champions League, the associations are allocated places according to their 2018 UEFA country coefficients, which takes into ...
Basically you're making the mistake a lot of people make.
Revenue is not their account balance
The numbers show what they've made throughout the year, but having a positive revenue for years adds up for much more than that. See Bayern Munich for example. They have a lot more money than shown on that chart, since they don't invest it in top tier super stars (...
Teams of the English Premier League can earn a maximum of five places between them in the UEFA Champions League, and a maximum of seven places in all European continental competition.
Those places are allocated as follows:
Winner of UCL 18-19, if any
Winner of UEL 18-19, if any
EPL 18-19 #1
EPL 18-19 #2
EPL 18-19 #3
EPL 18-19 #4 (gets dropped to UEL 19-20 ...
You have mentioned that Real Madrid has an annual revenue of €750M, but that is not the profit. Its their earnings. The club does have a lot of expenses right from salaries to the players and organizing scouts and their academy and so on. The net profit of Real Madrid in the last three seasons is around 100m - 200m as they weren't spending any money in ...
Regulations of the UEFA Champions League 2018-21 Cycle:
1) If UEFA Champions League and UEFA Europa League title holders are both from England and they both finish outside of the top four in Premier League, then the 4th placed Premier League ...