Enter what chlorine costs you now and what the salt system would cost — see yearly costs side by side and the payback point.
The payback formula
chlorine/yr = monthly spend × season months
salt/yr = (cell price ÷ cell years) + salt & acid
payback = system cost ÷ (chlorine/yr − salt/yr)
The comparison people skip is amortizing the cell — a $650 cell every 5 years is $130 a year, every year, forever. Include it and salt still usually wins for heavy chlorine users, but the margin is honest instead of imaginary.
A worked example
$60/month of chlorine across a 6-month season is $360 a year. The salt route: $130/year of amortized cell plus $80 of salt and acid = $210 — saving $150 a year. A $1,600 installed system pays back in about 11 years, which is honestly marginal. But at $100/month of chlorine (bigger pool, hotter climate), the saving is $390/year and payback drops near 4 years — clearly worth it. Your chlorine spend is the whole answer.
The non-money factors
In salt's favor: silky water, no jug runs, steady chlorine every day without remembering. Against: pH drifts up (more acid, more attention to the saturation index), cells scale in hard water, and very old fixtures or certain natural stone don't love salt. Most converts say the daily steadiness alone was worth it — but now you know what it actually costs.
Frequently asked questions
Is a salt water pool cheaper than chlorine?
Usually yes on running costs — salt is cheap and the generator makes chlorine from it — but the system costs $1,200–2,500 installed and the cell wears out every 3–7 years at $400–900. Whether the total wins depends on how much chlorine you currently buy; that's what this calculator settles.
How much does a salt water generator cost?
Commonly $900–1,800 for the unit sized to your pool, plus $300–700 installation if you don't DIY. Oversizing the unit relative to your pool extends cell life and is usually worth the up-charge.
Do salt pools use no chlorine at all?
They ARE chlorine pools — the cell generates the same sanitizer from salt. You skip buying and hauling jugs, but you still test the same chemistry, and you'll occasionally supplement with liquid chlorine after storms or for a SLAM.
What are the hidden costs of converting to salt?
Cell replacements are the big one (budget for them with our salt cell calculator). Salt pools also drift pH upward, so acid use typically rises, and salt is corrosive to some older metal fixtures and certain stone copings — worth checking before converting.