Cash flow in COD: how much cash you need for every €1,000/day in ad spend

Rafael Mendes · 2026-10-07

For those running e-commerce with a COD (Cash on Delivery) model in Europe, understanding cash flow is essential to keeping the operation healthy. Let’s break down the key points so you can calculate how much cash you need for every €1,000 in daily ad spend.

20–30 day payback

The average payback period for COD campaigns is usually between 20 and 30 days. This means that, on average, you’ll need to wait that long to recover your ad spend. If you’re spending €1,000 a day on ads, assume that by the end of 30 days, you should have generated a return that covers that amount. To make sure the operation doesn’t run at a loss, it’s wise to have at least €30,000 in cash to cover ad costs until the sales are completed and paid out.

Keeping cash flowing

Keeping cash flowing is essential. This means having funds available not just for ads, but also to cover other costs, like logistics and suppliers. A good rule of thumb is to always keep at least 20% of gross revenue available to reinvest in ads and operations. So, for every €1,000 in revenue, keep at least €200 in cash for unexpected expenses.

Weekly forecasting

Making weekly forecasts helps you get a clear picture of your cash flow. If you expect €2,000 in sales from €1,000 in ad spend, build your weekly forecast around the days when sales tend to be higher, like weekends. For example, if you expect to make €2,000 in sales in a week, you should plan for enough cash to support not only the campaign but also unexpected expenses, like returns or delivery delays.

Leverage: credit card + mixed COD

Using a credit card to finance part of your ad spend can be an interesting lever, especially if you can get a card with a 30-day payment term. By combining COD and credit card strategies, you can increase liquidity and ease the pressure on cash flow. This lets you scale your campaigns without waiting for sales revenue to come in right away.

The mistake of scaling without cash

One of the biggest mistakes I see is scaling campaigns without enough cash. If you don’t have a financial cushion to support the increase in ad spend and the sales that come with it, you could end up in trouble. Always assess your cash position before increasing spend. If you’re scaling and don’t have at least 1.5 to 2 times your daily ad spend in cash, it’s better to ease off a bit.

In conclusion, for every €1,000 in daily COD ad spend, consider having at least €30,000 in cash, while also maintaining a solid weekly forecast, balancing your leverage between credit card and COD, and avoiding scaling your campaigns without a healthy cash reserve.

How many euros do you have in cash for every €1,000 you spend on ads?