The verdict, line by line
At the defaults of the companion calculator — 2 cups a day for 365 days, beans at $16.00 a pound, a french press dose of 17 grams a cup and a drip dose of 12 grams, a $30 press lasting 3 years and a $60 drip machine lasting 5 years, filters at $0.04 a cup, and drip electricity at 0.10 kWh a day and $0.17 per kWh — the french press costs $447.74 a year and the drip machine costs $356.40 a year. The press burns 12,410 grams of coffee in the year and the drip machine burns 8,760 grams, and the gap is $91.34 a year in drip's favour. That is the whole verdict in one paragraph; the rest of this guide is about how far you can trust it, what moves it, and what to do with it.
Why drip wins at the defaults: it is the dose
Drip wins first on beans, and the per-cup numbers show why. A french press at 17 grams a cup and $16.00 a pound spends about $0.60 of coffee in every cup, while a drip machine at 12 grams a cup spends about $0.42 — and over 730 cups a year that gap becomes $437.74 of coffee for the press against $308.99 for drip, a bean gap of $128.75. Drip then gives back $47.41 of that gap: filters at $0.04 a cup add $29.20 a year, the $60 machine over 5 years adds $12.00 a year, and electricity at 0.10 kWh a day adds $6.21 a year, against just $10.00 a year for the $30 press over 3 years. Add the two parts and you get $447.74 against $356.40. The lesson is not that the press is badly made; it is that five extra grams in every cup, multiplied by hundreds of cups, is the most expensive part of the morning. If your dose or bean price differs, run your own numbers — but expect the same winner wherever the dose gap holds.
Cup count and bean price branches
Cup count scales the bean gap without changing the equipment gap, so drip's lead grows with every extra cup. At 1 cup a day the press costs $228.87 (coffee $218.87 + equipment $10.00) against drip at $187.31 (coffee $154.50 + filters $14.60 + machine $12.00 + electricity $6.21), a saving of $41.56, while at 4 cups a day the press costs $885.49 (coffee $875.49 + equipment $10.00) against drip at $694.60 (coffee $617.99 + filters $58.40 + machine $12.00 + electricity $6.21), a saving of $190.89. Bean price moves the same way: at $24.00 a pound the press costs $666.61 (coffee $656.61 + equipment $10.00) against drip at $510.90 (coffee $463.49 + filters $29.20 + machine $12.00 + electricity $6.21), a saving of $155.71, while at $10.00 a pound the press costs $283.59 (coffee $273.59 + equipment $10.00) against drip at $240.53 (coffee $193.12 + filters $29.20 + machine $12.00 + electricity $6.21), a saving of $43.06. In none of these branches does the winner change: no plausible cup count or bean price erases a 5-gram dose gap priced into every cup. The only thing that flips the result is the dose itself, covered next.
The honest flip: brew the press at the drip dose
Here is the plain statement the calculator makes and this guide repeats: at the default doses there is no flip, at any cup count or bean price, because the press simply uses more coffee per cup and drip's extra costs are far smaller than the bean gap. A flip appears the moment the dose gap closes. Brew the press at 12 grams a cup, the same as drip, and the bean costs equalize at $308.99 a year each; the press total falls to $318.99 a year ($308.99 + $10.00 equipment) against drip at $356.40, and the press wins by $37.41 a year — exactly the machine, filter, and electricity costs drip carries that the press does not. Read that case for what it is: the press does not win because it is a press, it wins because at equal doses it has nothing else to pay for. If you love press coffee, the cheapest move is not a new brewer at all: it is a kitchen scale and a 12-gram scoop, which keeps the press cup you like and pockets the $37.41.
What the calculator leaves out
The calculator prices brewing cost only, so three things that matter are outside it. The first is taste: a press cup is heavier, oilier, and more textured than a drip cup, because the metal filter lets oils and fine grounds through while a paper filter holds them back, and many drinkers will happily pay $91.34 a year for the cup they prefer. The second is time and effort: a press needs a kettle, a four-minute steep, and a careful pour, while a drip machine runs itself on a timer — and for a household rushing out the door, that convenience can be worth more than the saving. The third is everything small and recurring that the lines simplify: water, kettle electricity for the press, replacement carafes and screens, and the beans spilled or ground and never brewed. None of that changes the $447.74 against $356.40 arithmetic, but all of it belongs in the buying decision. Weigh one real dose on a kitchen scale and enter your own grams per cup for the most accurate result.
Which brewer for which drinker
For a household that drinks 2 cups a day and wants the cheapest good coffee with the least fuss, drip is the clear pick: the $91.34 yearly saving is real, the timer does the morning work, and the lighter dose stretches every bag further. For the drinker who loves a heavy, full-bodied cup and is willing to weigh the dose, the press at 12 grams is the honest bargain: the same cup character at a $37.41 yearly win over drip, provided the lighter dose still tastes right to you. For a heavy household at 4 cups a day, the arithmetic is the loudest voice in the room — $885.49 against $694.60 — and drip's $190.89 saving buys a lot of better beans. In every case, run the companion calculator with your own cups, bean price, and dose, and let the numbers — not the showroom — decide which brewer is cheaper in your kitchen.
The bottom line
At the defaults, drip beats the french press by $91.34 a year: $447.74 (12,410 grams of coffee) against $356.40 (8,760 grams). The gap grows with cup count and with bean price, survives cheap beans, and flips only when the press dose falls to the drip dose of 12 grams, where the press wins by $37.41 a year. Enter your own numbers in the companion calculator, weigh your dose, and buy the brewer whose yearly cost — and whose cup — fits your morning.
This guide prices brewing cost only, at steady doses and a steady bean price, excluding water, kettle electricity, replacement carafes, and taste. Real doses vary with scoop size and grinder retention, and a press cup and a drip cup are not the same drink — the $91.34 gap is real money, but taste may fairly overrule it.