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An infrastructure jump is when a nation saves enough income and/or aid to buy a set number of infrastructure levels (usually greater than or equal to 200) to avoid the net income loss involved in increasing its infrastructure past a multiple of 1000.


At certain times when a nation goes from having X999 to Y000 (for example, 1999 to 2000) infrastructure, it experiences a drastic increase in the cost and upkeep of infrastructure per unit. For example, when going from 999 to 1000 infra, infra cost and upkeep go up by 22%.

Because of these increases, despite an increase in gross income, a nation's net income actually suffers because of the disproportionately high rise in infrastructure upkeep bills.

Thus, to avoid this relative income loss, a nation must perform what is known as an infra jump. Infra jumps entail saving enough money to buy at least 200 units of infra at once in order to jump from, for example, 999 to 1199 infrastructure. After this jump, a nation's income and the rise in bill level have once again leveled off so there is no relative loss of income.

The amount of infrastructure required to pass each jump typically increases as a nation accumulates more infrastructure; therefore, some nations choose to bypass the jump entirely by going from, for example, 999 to 1999 infrastructure and again saving for the next jump.

Cost spikes occur at 1000, 3000, 4000, 5000, 6000, 8000, and 15,000 infrastructure (there are also smaller spikes at 20, 30, 40, 50, 60, 150, and 250 infrastructure). Upkeep spikes occur at 1000, 2000, 3000, 4000, 5000, 8000, and 15,000 infrastructure (there are also smaller spikes at 30, 40, 60, 80, 120, 200, 300, 500, and 700 infrastructure).

However, due to game mechanics, these spikes do not actually take effect until a nation's infrastructure is greater than the jump point. This means that 1000.000 infrastructure will use the lower costs, but 1000.001 infra will use the higher costs. This also applies to, for example, infrastructure requirements for navy vessels. (Infrastructure values can be seen up to three decimal points on the comparison graphs when viewing the Charts page of another nation, but there can be hidden values beyond that. Experimentation is required to determine a nation's true infrastructure level. Buying 0.0001 infrastructure does work; however, infra values for display on the nation page are truncated after the first two decimal places.)

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