Most homeowners think about softener salt only when the brine tank runs low. The better time to plan is when the delivery arrives, because the place where the bags sit determines whether the salt pours into the tank cleanly or turns into a hard block you have to break up with a broom handle. Storage is an ownership task, and it is one you can set up once and check every few months.
Pick the spot before the bags come in
Look for a place that stays dry and out of the way. A basement corner can work well, but only if it stays dry in wet weather. Walk the area after a heavy rain or during a humid stretch and look for dampness on the floor, water marks on the wall, or a musty smell. Keep the salt away from the water heater, the washer, and any appliance that can leak, because a single slow drip can wet the bottom bags and ruin them before you notice.
Check whether the spot is near a floor drain or a sump. Salt spills are normal, and you want to know where a dropped bag or a torn corner would send loose pellets. Ask yourself whether you could sweep the area without moving the whole stock, and whether a child or pet could reach in and tear a bag open.
Get the bags off the concrete
Concrete slabs hold moisture, and bags that sit directly on them can wick damp from below. Use a pallet, a wooden rack, or a sturdy shelf so the bottom layer stays clear of the floor. Leave a small gap between the stack and the wall so air can move around it. Do not stack bags so high that the lower ones bend or split under the weight. If the bags come on a pallet from the delivery crew, ask whether the pallet can stay in the spot you chose, because moving it later means more lifting.
Look at the bags when they arrive
Before you carry anything inside, check each bag for tears, wet patches, or a seal that is already open. A bag that came in wet from a truck or a loading dock may be fine, but it is better to know it on the day it arrives than when the tank is empty. Ask the delivery person or the company how they package and transport the salt, and whether they will replace a bag that arrives damaged. Keep the paperwork or a photo of the label so you know which salt type you bought.
Match the stock to the tank
The useful question is not how many bags you own but how many refills they cover. Open your owner's manual or ask your service provider how much salt a full brine tank takes at a normal fill, then compare that figure to the bags on hand. Write the number on a card near the storage spot along with the date of the last delivery. This is a short note, not a log, and it tells you when to reorder before the level window in the tank drops out of sight.
Keep the oldest bags at the front so you use them first. If you have bags of different types, keep them on separate shelves and label them clearly. Mixing types can make it harder to tell what you are adding to the tank when you refill.
Handle the bags safely
Lift with your legs and keep the bag close to your body. A forty-pound bag is awkward to carry down stairs, so if the storage spot is on a lower level, plan the route before you start. Open bags over the tank opening or a clean tarp so loose pellets land in the right place. Sweep up spills immediately and keep the broom out of any drain that connects to a pump, since salt can build up and cause trouble there.
When storage is not enough
If the storage spot keeps getting damp no matter what you do, the problem is the location, not the salt. Move the stock to a drier room, or ask a qualified service provider to look at moisture sources in the basement. For help choosing a company that can check your setup along with the softener itself, the ranking of St. Louis water softener companies is a reasonable starting point, and the methodology page explains how those rankings are built so you can judge them for yourself.