Any new and small business MUST follow its cash flow. At the same time you have monthly fixed overhead (rent, warehousing, staff, communications, etc.) peaks and valleys in your cash flow can be a death by a thousand cuts. As you have bad revenue months you must delay paying vendors. This in turn can ruin your credit terms. This means you have less flexibility in your cash flow. This in turn makes low cash flow months even harder. Yikes, it's a rough cycle.
If you have a business in which you are one-off charging clients for your services or goods it's time to rethink you pricing model. I have two different friends with services businesses. In each case they sell entertainment services one-off. They have loyal customers but not everyone takes advantage of every event. One of them also suffers from seasonality. There are some months in the year when there are just no events offered. If you were to draw a simple line chart of their business cash flows you'd see zig zags up and down. It's the downs that are a concern. Most companies spend all the extra cash on the up cycles. It takes a lot of discipline not to.
If your business suffers from peaks and valleys in revenues then consider moving to annualized payments with your customers. This concept is perfectly valid. In some cases you must account for the annual payment as a prepaid credit so you can't recognize all the revenue up front BUT you have the cash up front and that's the point.
Lots of businesses use this model. Think of magazine subscriptions. Could you imagine paying $1.25 per month for your magazine subscriptions every month? No, they charge for 1 or more years up front, even if they are very expensive professional subscriptions that cost hundreds of dollars. Think of professional membership fees. These are annualized. Could they bill monthly? Yes, but they don't.
In moving to an annualized model you typically greatly reduce your adminstrative and billing expenses. Instead of monthly billing you're now down to 1/12th the effort to bill and receive/track payment.
Clients may balk at paying annual memberships or annual payments so consider some sweetners. You can offer a discount for the conversion. Do you have the administrative savings to offer a 5 percent or 10 percent reduction in the overall price? You can offer a "buffet style" of your services or offerings. People can get "all they can eat" verses item for item billing/charges for pay as you go. You can bundle in extras. For the annual fee you get extra support, extra warranty, extended hours, extra access.
The overall point is converting how your clients pay can have a huge impact on cash flow, on budgeting and reduce your administrative expenses. It's something you should consider.