The cheapest time of year to go to Tanzania is typical during the low season, which occurs during the rainy season. The rainy season is generally characterized by wet weather conditions and occasional flooding, which can make some roads and parks difficult to access. As a result, tourist numbers tend to be lower during this time, and prices for accommodations and tours may be lower as well.

The low season in Tanzania occurs from March to May, and from November to early December. During this time, you may be able to find discounted rates on accommodations, flights, and tours. However, it's important to note that the weather conditions during the rainy season can be unpredictable, and some activities may be limited or unavailable due to road closures and other factors.

If you're looking to save money on your trip to Tanzania, you may also want to consider traveling during the shoulder season, which occurs just before or after the high season. During the shoulder season, prices for accommodations and tours may be lower than during the high season, but you can still enjoy good weather conditions and fewer crowds