Maintenance is the cost of keeping your space vehicles running. To provide the supplies and repair that your ships need, your empire must pay a maintenance amount each turn. The maintenance for your empire is calculated as the total of 30% of the cost of each ship or base currently operating. If you cannot pay your maintenance cost, then some of your ships will be scrapped as they fall into disrepair.

The maintenance amount required is automatically subtracted from your total generated resources each turn before they are used for anything else (as shown in the Empire Status Window). You can prevent paying maintenance on certain ship by mothballing them.

The cost per turn is the sum of the maintenance cost for all of your currently operating ships and bases. The maintenance cost for a ship or base is calculated as 30% of its cost in resources.