English idioms relating to consequences-effects-results.

Answer for something	If someone has to answer for something, they have to accept responsibility for their actions. "He will have to answer for his dishonesty."
Be that as it may	This expression means that what the speaker says may be true but it will not change the situation. "OK. Fewer people may come because of the bad weather, but be that as it may, it's too late to cancel the show."
Can't make an omelette without breaking eggs	This expression means that it is impossible to make important changes without causing some unpleasant effects. "Some people will lose their jobs after the merger, but you can't make an omelette without breaking eggs."
Change the face of something	When an innovation, discovery or event changes the face of something, it alters it completely or in a major way. "Social networks have changed the face of modern communication."
Chickens come home to roost	If you say that chickens have some home to roost, you mean that bad or embarrassing things said or done in the past by someone are now causing problems for that person. "As tenants the couple were noisy and disorderly. Now they can't find a place to rent. The chickens have come home to roost! "
Come to a bad end	If someone comes to a bad end, their actions lead to disastrous consequences which are sometimes deserved or predictable. "If that boy doesn't change his ways, he'll come to a bad end!"
Come with the territory	To say that something comes with the territory means that it has to be accepted as part of a job or responsibility, even if it is unpleasant. "A successful actor has to expect intensive media coverage - it comes with the territory!"
Come what may	To say that you will do something come what may means that you will do it whatever the consequences may be. "Come what may, I'm going to tell my mother-in-law what I think of her attitude!"
Comeuppance/ get one's comeuppance	When someone gets their comeuppance, they receive the treatment they deserve (usually punishment or retribution) for their behaviour or actions. "The pupils who are bullying the newcomers will soon get their comeuppance."
Cut both ways	Something that cuts both ways has both a positive and a negative effect at the same time. "Banning cars in the town centre can cut both ways : less traffic congestion but fewer customers in the shops.
Devil to pay	This expression means that there will be trouble as a result of something. "There'll be the devil to pay if you break anything!"
Even the score	When a person decides to even the score, they try to get their revenge on someone who has cheated or done them harm. "When Jack discovered that Bob had cheated, he was determined to even the score."
Face the music	If you have to face the music, you have to accept the unpleasant consequences of your actions. "He was caught stealing. Now he has to face the music!"
Fall from grace	To say that someone has fallen from grace means that they have done something wrong, immoral or unacceptable, and as a result have lost their good reputation. "The Finance Minister fell from grace as a result of a sex scandal."
Fall into place	When different elements fall into place, they fit well together or become organized so that progress can be achieved in a satisfactory manner. "The preparatory work was difficult but gradually everything fell into place and the project was finished on time."
Fall on one's sword	If you fall on your sword, you take responsibility for, or accept the consequences of an unsuccessful or wrong action. "The organizer of the referendum resigned when the poor results were announced. It was said that he 'fell on his sword'."
Get your fingers burnt	If you get your fingers burnt, you suffer as a result of an unsuccessful action and are nervous about trying again. "He got his fingers so badly burnt in the last elections that he decided to withdraw from politics."
One's own undoing	If you do something that is the cause of your own failure, loss or downfall, it is your own undoing. You can blame nobody but yourself. "If he continues to gamble like that, it will be his own undoing."
Open doors to/for something	If something opens doors, it provides opportunities or possibilities for the future. "A degree from a top university generally opens doors to major companies."
Price you have to pay	This expression refers to what you have to endure in return for something you gain or achieve. "Lack of privacy is the price you have to pay for being a celebrity."
Reap the harvest	If you reap the harvest, you benefit or suffer as a direct result of past actions. "When he won his first match, he began to reap the harvest of all the hard training."
Ripple effect	When an action has an effect on something, which in turn effects something else, it is said to have a ripple effect. "An increase in the price of oil will have a ripple effect on the economy as a whole."
Slap on the wrist	If you get a slap on the wrist, you receive a mild punishment or you are reprimanded for something you have done. "I got a slap on the wrist from my wife for leaving the kitchen in a mess."
Take the rap	If you take the rap for something, you accept blame or punishment for something, even if you are not responsible. "The whole class had to the take the rap for the disorder.
Tit for tat	This expression refers to an injury or insult given in return for one received. "He kicked me, so I kicked him - it was tit for tat!"
You can't unring a bell	This expression means that you cannot undo what has been done, so you must live with the consequences of your actions.
Wind up in the wrong hands	If something winds up in the wrong hands, it comes into the possession of someone undesirable, for example an opponent or a competitor. "Put the plans away carefully. We don't want them to wind up in the wrong hands."
Do a world of good	If something does you a world of good, it is beneficial and makes you feel you a lot better. "Why don't you go away for a few days? It'll do you a world of good to get a break."