How do I best archive old business documents?

Definitely don't just stack them in cardboard boxes and throw them in the basement - that's asking for mold and pests 😅 The best thing is to store the documents somewhere dry, ideally in sturdy folders or archive boxes in a cool place without direct sunlight. If you've got a lot of material, a digital solution is worth considering too - scanner + cloud or external hard drive, then you save space and can access things faster. Also think about retention periods, depending on what kind of documents they are - some you need to keep longer than others.

How much longer do you need those documents regularly? If it's just about long-term archiving, I'd really recommend digitizing them - scanners aren't expensive anymore anyway, and you'd save yourself all the storage space. Important thing though: if you still need the original receipts for your tax return, you can't just throw them away afterwards, but have to keep them for several years - a lot of people forget that there are specific retention periods for that.

Digitizing is actually the right approach, but I'd say you shouldn't just throw away the physical originals in parallel - depending on what kind of documents they are, there are legal retention periods you should check. Business documents like invoices, contracts, or annual reports often have to be kept for 6-10 years. That means you need a hybrid solution: the originals stay in dry, protected storage, and at the same time you make a digital copy as a backup and for everyday use.

For physical storage, I wouldn't go for cheap cardboard boxes, even if they look practical. Instead, I'd go with acid-free archive boxes - they're a bit pricier, but your documents will actually last for decades. The storage should be dry, dark, and at constant temperature. Basements are often not ideal because humidity fluctuates. A dry shelf in the office or some kind of filing cabinet is better. And yeah, plastic bags are the enemy - paper needs to be able to breathe.

As for digitizing: with a decent scanner (those devices have gotten really cheap) or even just a good smartphone scanner app, you can do it yourself. What matters is that you save the files in a format that's stable long-term (PDF is a safe bet), and then create multiple backups - an external drive plus maybe a cloud solution. That way you've got security on both sides and can quickly access the things you need.