Startup cost: $0 - $500

On the low end, participating in studies often requires no upfront cost as many platforms like Prolific or MTurk are free to join. You just need a computer and internet access, which most people already have. On the high end, someone might invest in a better computer setup, high-speed internet, or software to manage study opportunities more efficiently. Optional costs could include a subscription to a service that aggregates study opportunities or a premium account on a platform to access higher-paying studies. Hidden costs might include transaction fees for payment processing or taxes on earnings. While many claim it's low-cost, expenses can increase if you aim for efficiency and higher earnings.