The printer aisle is a bet. The inkjet says: pay me $60 now and $20 every few months forever. The laser says: pay me $160 now and $60 every year or two. Which offer is better depends entirely on one number the box never prints — how many pages a month you’ll actually run through it. This is the honest version of that math, including the part the spreadsheet misses.

The two-line model

Every printer’s true cost over its life is:

total cost = printer price + (pages printed × cost per page)

Cost per page is cartridge math (the benchmarks table has the ranges): a cartridge inkjet lands ~5–15¢ mono, a mono laser ~2–5¢. The two curves — cheap box/expensive pages vs expensive box/cheap pages — cross at a volume called the breakeven:

breakeven pages = (laser price − inkjet price) ÷ (inkjet cpp − laser cpp)

With representative numbers — $80 inkjet at 10¢/page vs $160 mono laser at 3¢/page — the gap is $80 against 7¢/page: ~1,143 pages. Over a three-year printer life that’s about 32 pages a month. Print more than that and the laser’s sticker pays for itself; print less and the inkjet was the cheaper device all along. The calculator draws these two lines against your actual cartridges and prints the crossover — no interpolation required.

What the math misses — and why it still usually points the right way

The two-line model is honest arithmetic with three blind spots:

1. Inkjet ink dies of disuse. Toner is inert powder — it waits patiently for six months and prints fine. Liquid ink dries, clogs nozzles, and gets burned in maintenance cycles that consume ink without producing pages. An inkjet printing 15 pages a month delivers far fewer pages per cartridge than its ISO yield suggests — the cartridge ages out before it empties. This is why “I only print occasionally” is the laser’s strongest case even when the CPP math says inkjet: the inkjet’s effective CPP at low volume is much worse than its sticker math.
2. The failure tail. A clogged printhead on a cartridge-integrated head is a new cartridge; on a fixed-head printer it can be a new printer. Rare but real, and it lands entirely on the inkjet side of the ledger.
3. Refill/compat options shift the cpp term. Remanufactured toner and compatible ink both move the per-page cost down 30–60% — which can relocate the crossover by half. The reliability-adjusted version of that math lives in when third-party ink makes sense.

None of these flip the model — they tilt it. Treat the breakeven as a decision boundary with a fog around it: near the line, reliability and convenience matter more than the residual cents.

Three worked examples

The sporadic printer — 15 pages/month. Inkjet: $80 + 15×36×~$0.11 (after clog-adjusted yield) ≈ $139. Laser: $160 + 15×36×$0.03 ≈ $176. Math says inkjet by $37 — but assumes the cartridge survives three years of intermittent use, which is the exact scenario where inkjets die of neglect. Real answer: laser, because “it always prints” is worth more than $37 over three years.

The home office — 200 pages/month. Inkjet: $80 + 200×36×$0.10 ≈ $800. Laser: $160 + 200×36×$0.03 ≈ $376. The laser saves $400+ over three years — the sticker difference is noise at this volume. Tank printer enters here: ~1¢/page would cut the bill to ~$230 all-in, if the $250 sticker and monthly usage habit fit.

The photo hobbyist. Laser color economics are the worst in printing (12–25¢/page) and its photo quality is a distant second. An inkjet — ideally a dedicated photo inkjet or tank model — is the only honest answer, regardless of volume. Some decisions are use-case, not arithmetic.

The tank printer caveat, stated plainly

Bottle-refill inkjets (the EcoTank/MegaTank/Smart Tank class) collapse the classic tradeoff: mid-range sticker (~$250), laser-beating CPP (~0.3–1¢), color included. They did not obsolete this article — they moved the winner at moderate-to-high volume from “laser” to “tank” while leaving the physics intact: they still clog if unused, their stickers still punish low volume, and color lasers still lose to them on color CPP. If your monthly volume is real and regular, run the tank’s numbers in the calculator alongside the other two — the breakeven line will show you where it lands.

The honest summary

• Under ~20–30 pages/month: whichever device reliably prints when you need it wins — usually a mono laser, because toner doesn’t dry.
• Roughly 30–300 pages/month: the crossover zone — compute yours; tank printers usually own this band now.
• 300+ pages/month: the per-page price is nearly the whole story — tank inkjet or a high-capacity laser; the sticker barely matters.
• Photos, any volume: inkjet, always — the laser’s color math has no answer for it.

And the meta-rule over all of it: the printer is the small number; the cartridges are the annuity. Buy the consumables’ economics, not the box’s.

Frequently asked questions

I print maybe 30 pages a month — inkjet or laser?

For black-and-white, a mono laser almost always wins at that volume — not on cost-per-page alone but on reliability: toner can't dry out. An inkjet that prints 30 pages a month spends disproportionate ink on maintenance cycles, and a cartridge that clogs entirely costs 100% of its price for 0% of its yield.

What about tank printers — don't they change everything?

They break the classic tradeoff: laser-level CPP (~0.3–1¢ mono) at inkjet upfront prices, plus color capability. The classic answer survives in two corners — sporadic printers (tanks still clog) and very low volumes (any printer's sticker outweighs ink). At moderate-to-high volumes a tank printer is usually the correct economic answer.

Is the crossover really that low — ~20 pages a month?

With typical prices, yes — a $80 price gap ÷ ~10¢/page cost gap ≈ 800 pages, and over a 3-year horizon that's ~22/month. Your numbers decide yours: pricier toner or cheaper ink moves it either way. That's exactly what the calculator's breakeven line solves for your cartridges.

Does duplex or power use change the winner?

Duplex halves the paper term for both sides equally — it shifts absolute cost, not the winner. Power draw differences (~300–600 W fuser bursts on laser vs ~10–30 W inkjet) sound dramatic but cost under ~$1–3/month at office volumes — noise in this math, not a factor.

When should I absolutely not buy a laser?

When your pages are mostly photos (laser photo output is mediocre and its 'color' economics are the worst in the business at 12–25¢/page), when you need it rarely but can't tolerate a clog (that's when laser wins — reversed: very rare printing is the laser's best case), or when a tank inkjet already gives you cheap color and you've verified you'll use it monthly.