In terms of capital (i.e., cash money), it depends on your business; one common rule of thumb is 3 months’ worth of cash to run the business. If you mean compliance, you’ll need annual minutes and, in California, an annual filing with the Secretary of State. You’ll also need to memorialize extraordinary transactions, like leases and financings, in your corporate records. Without minutes and/or consents, you could expose the shareholders personally to liability.