I purchase services on behalf of a company; not a huge one but has some "enterprise-y" trappings. That said, make sure you're doing thinking and research about the companies you are targeting with your business. There's no one answer that covers all B2B transactions.
For me, dollar amount matters. Is your service $100/month? It can go on a credit card and get expensed; Legal might take a quick look at your online standard terms and conditions and privacy policy (which must exist if you want to sell to enterprises) but not likely to argue anything.
Is your service $5,000/month? Then I need a contract that is approved by the lawyers and signed and dated by human beings, and an invoice that Finance can validate against the contract for audit control, and then they will send you a check. Because all that is a pain in the butt, I prefer to do the whole thing only once per year on an annual renewal.
Is your service $20,000/month? All the same legal stuff above, but now I might prefer monthly or quarterly invoices for cash flow reasons. But I'm guessing since you're asking here that your SaaS business is probably is not charging $20,000/month. :-)
For me, dollar amount matters. Is your service $100/month? It can go on a credit card and get expensed; Legal might take a quick look at your online standard terms and conditions and privacy policy (which must exist if you want to sell to enterprises) but not likely to argue anything.
Is your service $5,000/month? Then I need a contract that is approved by the lawyers and signed and dated by human beings, and an invoice that Finance can validate against the contract for audit control, and then they will send you a check. Because all that is a pain in the butt, I prefer to do the whole thing only once per year on an annual renewal.
Is your service $20,000/month? All the same legal stuff above, but now I might prefer monthly or quarterly invoices for cash flow reasons. But I'm guessing since you're asking here that your SaaS business is probably is not charging $20,000/month. :-)