★ X VS Y COMPARISON · MONEY · PHONES
The sticker price is not the cost. Over 3 years, a $999 new phone that resells for $300 costs $699 net, while a $649 refurbished phone plus an $89 battery that resells for $150 costs $588 net — so refurbished wins by $111. Enter your own prices below and the verdict follows the same arithmetic, not the marketing.
The comparison that matters is what you pay minus what you get back, with the battery counted where it belongs. A refurbished phone that needs a battery in year two is not $649; it is $649 plus the battery. A new phone that holds its value is not $999; it is $999 minus whatever you sell it for. Put both sides through the same formula and the winner is arithmetic, not brand loyalty.
Net cost = purchase price + battery replacement − resale value after the ownership period. The new side has no battery line in this model, because a new phone starts with a new battery; the refurbished side carries one, because a used battery is the most likely mid-life expense. Everything else — cases, chargers, insurance, your carrier plan — is excluded from both sides equally, so it cannot change the verdict. Compare only what differs, and the comparison stays honest.
Setup: 3-year ownership. New phone $999, resale $300. Refurbished phone $649, battery $89, resale $150.
Line 1 — new net cost. $999 − $300 = $699.
Line 2 — refurbished net cost. $649 + $89 − $150 = $588.
Line 3 — the verdict. $699 − $588 = $111. Refurbished wins by $111 over 3 years, or about $37 a year.
Battery $0. If the refurbished phone already has a new battery, its net cost is $649 + $0 − $150 = $499, and it wins by $200. A fresh battery is the single best refurbished deal-maker in this model.
New resale $450. If the new phone resells for $450 instead of $300, its net cost is $999 − $450 = $549, and new wins by $39. Strong resale is the new phone's best defence.
Refurbished price $549. At a $549 refurbished price, its net cost is $549 + $89 − $150 = $488, and it wins by $211. A $100 discount on the refurbished side flows straight through to the verdict.
New price $799. If the new phone costs $799 instead of $999, its net cost is $799 − $300 = $499, and new wins by $89. A sale price on the new phone can erase the refurbished advantage entirely.
| Output | Formula | What it means |
|---|---|---|
| New net cost | New price − new resale | $699 at the defaults — what the new phone truly costs you over 3 years. |
| Refurbished net cost | Refurbished price + battery − refurbished resale | $588 at the defaults — what the refurbished phone truly costs you over 3 years. |
| Winner and margin | Lower net cost; margin = difference | Refurbished wins by $111 at the defaults — the amount you keep by choosing the cheaper net cost. |
The arithmetic is exact for the numbers you enter; the uncertainty is entirely in your resale and battery estimates. Resale values move with the next model launch, battery prices vary by shop and model, and a refurbished phone can need a repair this model does not price. The model also assumes a full 3-year hold on both sides: if you upgrade yearly, resale dominates and the comparison changes. Treat the margin as a guide, not a guarantee, and rerun it with pessimistic resale before you buy. Error policy: empty, non-numeric, or negative inputs are reported as errors rather than computed, as is any case where resale would push a net cost below zero.
Bright Side Kit. "New vs Refurbished Phone: True Cost." https://brightoolbox.com/new-vs-refurbished-phone/ Accessed October 24, 2026.Because resale repays part of the sticker price. A $999 phone that resells for $300 costs $699 net, not $999. Comparing stickers alone overstates the new phone's cost by the full resale amount.
Because only the refurbished phone starts with a used battery. A new phone's battery is new; a refurbished phone's battery may need replacing during your 3 years. If it already has a new battery, enter $0 and the refurbished win grows to $200 at the defaults.
When resale is strong or the new price drops. At the defaults, a $450 resale makes new win by $39, and a $799 new price makes new win by $89. New also wins on warranty and longevity grounds this cost model does not price.
No, deliberately. Costs that apply equally to both phones cannot change which one wins, so they are left out. If one side carries an extra cost the other does not, fold it into that side's price before comparing.
Then resale dominates and you should rerun the numbers. This model assumes a 3-year hold on both sides. With a 1-year hold, enter the 1-year resale values instead and the verdict follows the same formula.
They are estimates, and they move. A new model launch can cut resale overnight. Before buying, check live trade-in quotes for both phones and rerun the calculator with the pessimistic figure.
On cost, usually — but check the warranty. A $0 battery widens the win to $200 at the defaults, yet a short warranty or an older model with fewer software updates left can erase that advantage in practice.
Yes, the formula is the same. Enter the device's price, battery or repair allowance, and expected resale, and the net-cost comparison works for any device you buy, use, and resell.