RO on Rent vs Buying in Delhi NCR: the real 5-year cost

Almost every comparison of renting versus buying an RO stops at the sticker price: ₹15,000 to own it, ₹399 a month to rent it, and a conclusion drawn from whichever number the writer wanted you to notice. That comparison is useless, because it ignores the two costs that actually decide the answer. What you spend keeping the machine alive after year one, and how long the machine lives at all.

This is the full arithmetic for a Delhi NCR household, with every assumption stated so you can substitute your own quotes. It also names the case where buying is genuinely the better decision, because there is one.

The assumptions

These are typical Delhi NCR market figures for a domestic RO+UV+UF purifier, not quotes. If your numbers differ, the method still holds, replace the inputs and rerun it.

Five years, side by side

Renting is a flat line: ₹399 a month, which covers the machine, installation, quarterly servicing, every filter and membrane, and every breakdown repair. Buying is a large step at the start followed by an annual AMC from year two, once the warranty lapses.

Renting is ahead at every single point in the first five years. The gap is widest at the start, ₹10,212 in year one, and narrows slowly, because buying is paying down its capital while renting keeps paying rent.

The number that actually matters: break-even

The gap narrows every year, so eventually buying must win. The only question worth asking is when, and whether the machine is still alive when it happens.

The break-even year is the capital cost minus one year's AMC, divided by the difference between a year's rent and a year's AMC. What that formula exposes is that break-even is extremely sensitive to your AMC price, far more than to the purchase price.

The answer turns entirely on what you pay for AMC. At our own basic rate of ₹2,500 a year, buying overtakes renting at about year 5.5 — which is inside the 6-8 years a domestic RO survives in Delhi NCR, so on that price buying does pay back, narrowly, near the end of the machine's life. At the ₹4,000 a year most independents charge, break-even lands around year 14, roughly twice as far out as the machine lasts, and the payback never arrives. We are not going to pretend otherwise: if you can get a genuine ₹2,500 AMC and you intend to keep the machine eight years in your own home, buying is the cheaper route.

Why Delhi NCR tilts this further

The generic comparison above already favours renting. Local water conditions widen the gap, because every one of them lands on the owner rather than the renter.

High TDS eats membranes

Groundwater across Noida, Greater Noida, Ghaziabad and Gurugram routinely tests between 800 and 2000 TDS. A membrane rated for a few years on treated municipal supply is consumed far faster at that input. If your AMC is basic rather than comprehensive, that is a recurring bill you did not budget for, roughly annually.

Sediment kills pre-filters, and then pumps

Newly commissioned borewells, the norm in Greater Noida West and the newer Faridabad sectors, throw sediment for months. Choked pre-filters make the booster pump work against resistance, and pump failure is the single most common out-of-warranty repair we attend.

Delhi NCR moves house

A great deal of the region lives in rented flats and PGs. An owned purifier has to be uninstalled, transported and refitted at every move, and its resale value is close to zero. A rented one gets moved by us, free, and simply stops costing you anything when you no longer want it.

When buying is genuinely the better call

There is a real case for buying, and anyone who tells you otherwise is selling something. Buy if all three of these are true:

1. 1You own the home and expect to be in it for ten years or more.
2. 2You can get a dependable AMC for around ₹3,000 a year, at that price buying overtakes renting from roughly year seven.
3. 3Your input water is treated municipal supply at a few hundred TDS, not borewell, so the membrane lasts and the repairs stay rare.

If any one of those fails (you are renting your home, your AMC quote is ₹4,000 or above, or you are on borewell water) the arithmetic points the other way, and it is not close.

The costs that never reach the spreadsheet

• Downtime. An owned machine that fails is your problem to chase; you are without drinking water until a technician is free. On rent, a breakdown is attended within 24 hours and an unrepairable unit is swapped, not argued about.
• Depreciation. A five-year-old RO has essentially no resale value. The capital is gone, not stored.
• Obsolescence. If your water supply changes (a new borewell, a switch to tanker) an owned machine may be the wrong specification. A rented one gets changed for the right one.
• Decision fatigue. Every service call on an owned machine is a negotiation about whether a part is genuine and whether the price is fair. On rent there is no transaction to get wrong.

The verdict

For most Delhi NCR households, renting is cheaper for about 5.5 years even against the cheapest AMC on the market, which is ours — and for roughly 14 years against what most independents charge, which is longer than the purifier will survive. It stays cheaper indefinitely if you would otherwise take a comprehensive AMC.

Buying is the better decision in one specific situation: your own home, a long horizon, gentle water and a cheap reliable AMC. That is a real scenario and worth taking seriously, but it describes a minority of the households we install in.