The soft, stubborn drip from a bathtub spout is more than just a nuisance. In many homes it indicates worn seals, a failing cartridge, or simple plumbing quirks that, left untreated, can waste hundreds of gallons of water each year and add to your utility bill.

Understanding the common causes is the first step toward a lasting fix. If you have an older faucet, a worn O-ring or seat washer can allow water to escape around the spout. In more complex setups, the problem may be a worn cartridge inside a single-handle faucet or a faulty diverter in a tub/shower combo. Start by identifying the faucet type: two-handle, single-handle, or a pressure-balanced unit.

Before you take tools to your bathroom, gather a few basics: an adjustable wrench, a screwdriver set, replacement seals or cartridges recommended by the faucet’s manufacturer, plumber’s tape, and a small container to catch any residual water. Turn off the water supply to the bathroom and open the faucet to relieve pressure.

Fixing options range from simple to complex. For a dripping spout due to a worn O-ring or washer, you can often replace the seal inside the faucet body with minimal leakage. For cartridge-based models, replacing the cartridge typically stops the drip if the cartridge is worn or damaged. If the diverter valve is the culprit in a tub/shower setup, replacing or resealing the diverter can stop the flow between tub and shower modes.

Cost-wise, a DIY fix with basic parts usually costs between $5 and $40, depending on faucet type and parts quality. Hiring a plumber typically ranges from $150 to $300 for a quick repair, though complex jobs or emergency visits can be higher. If you’re renting, check with your landlord first, as some maintenance costs may be covered by your lease.

When should you call a professional? If you notice persistent leaks after a DIY replacement, if the faucet is old or corroded, or if the plumbing behind the wall is involved, a licensed plumber can diagnose hidden issues and prevent more serious water damage. In multi-unit buildings, ongoing leaks may indicate broader plumbing problems that require cooperative action.

Bottom line: a dripping bathtub spout is a solvable problem that saves water, money, and stress. With the right parts and a measured approach, you can stop the drip and protect your bathroom from further wear.