A Business deal is an event that occurs during the course of a SimCity game. The player is given the option to build or sell a certain thing within their city. In exchange, they are paid a certain amount of currency each month or as a one time offer. The catch is that the business deal is typically something undesirable.
SimCity[]
The original SimCity planted the seeds of the business deal with the casino. The casino provided $100 per month and a boost to commercial growth, but it also increased crime.
SimCity 2000[]
Like SimCity, SimCity 2000 didn't technically have business deals. Players did occasionally get offered the chance to have a military base. The player wasn't given money, but did have the option to call the national guard during emergencies. However, military bases increased pollution and crime.
SimCity 3000[]
SimCity 3000 was the first game to formally add the business deal. A petitioner approaches the player and asks for a building to be built. As long as their building has power, water, and a road next to it, the player gets paid each month. The deal is canceled if the building is destroyed.
Business deals[]
- Casino (Increases crime and traffic)
- Chemical Waste Disposal Plant (Increases pollution substantially)
- GigaMall (Decrease demand for commercial buildings)
- Maximum Security Prison (Increases crime and pollution)
SimCity 4[]
Business deals made a return in SimCity 4. They work in much the same way as they do in SimCity 3000. In SimCity 4: Rush Hour, some of the U-Drive-It missions can only be unlocked by business deals.
Business deals[]
- Army Base ($350 a month, but negatively impacts residential growth)
- Casino ($300 a month, but increases crime)
- Federal Prison ($250 a month, but negatively impacts growth)
- Missile Range ($450 a month. Negatively impacts growth and there's a chance of a misfire)
- Toxic Waste Dump ($400 a month, but causes radiation and water pollution)
- Area 5.1 ($380 a month, but causes air, water, and land pollution plus significantly raised crime)
SimCity (2013)[]
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Sims of a city will offer advice and such on what should be built, what money should be spent on, and where resources should be allocated. You can also make money or pay to use or give other cities a portion of your/their utilities such as water, power, sewage treatment, or services such as police vehicles or waste management, based on a monthly cost.
SimCity BuildIt[]
Business deals are instant in SimCity BuildIt without any negative effects, aside from sometimes losing currency. Deals with the 
Simoleon, 
NeoSimoleon, or regional currency icon pop up frequently, with an offer to sell a random quantity of an item in exchange for the currency of that type of deal. These deals are more commonly undesirable than profitable but occasionally the offer of a final product, such as a TV, is offered a price higher than its maximum value in the Global Trade HQ. Items that are used in producing higher value items, such as planks, are generally not considered good deals. Regional items tend to be offered very profitable deals.
Deals can either be accepted and items are sold immediately, cancelled to remove the deal and another will pop up after a short cooldown, or tapping anywhere outside of the deal window will keep the deal available. Completing or cancelling deals will not affect future deals. Deals are also inactive during an Epic Project.
To maximize profits, it's helpful to know the values of items being asked. If an item is currently owned, it can be placed in the Global Trade HQ, unlisted, to see its maximum price.
See also: List of items in SimCity BuildIt