Why stacking is so dangerous
Two advances means two daily debits against one revenue stream. The second is almost always priced worse than the first, because the funder writing it can see the exposure it is adding to.
The arithmetic compounds against you. If one advance takes 12% of daily deposits and the second takes 10%, more than a fifth of everything you collect leaves before it reaches wages, rent or stock.
The usual sequence is a difficult month, a second advance to bridge it, a third to service the second, and then a business paying most of its revenue to funders. Recovering from that generally requires settling rather than trading through it.
What it does to your file
Most advance agreements contain a covenant against additional financing. Taking a second one is typically an event of default on the first, whether or not anyone acts on it immediately.
Underwriting reads bank statements, so a second daily debit is visible to every funder you approach afterwards. It reduces what you can raise for a long time.
A UCC filing from the first funder is also on the public record, which is how a second funder often finds out before you mention it.
What to do instead
Ask your existing funder about a renewal or a buyout. Once you are meaningfully through the term, most will refinance the balance into a larger advance — one debit, not two, and usually at a better rate than a stack.
If the need is equipment, finance the equipment. It is a separate secured product that a funder generally will not treat the same way as a second unsecured advance.
If the need is a genuine short-term gap, a reduced debit through reconciliation costs nothing and does not add a second obligation.