A single loaf of homemade sourdough bread costs roughly $1.50 to $3.00 in ingredients and energy, depending on the flour you choose. That’s a fraction of the $8 to $10+ you’d pay at a bakery or specialty grocery store. Here’s exactly where that money goes.
Ingredient Cost Per Loaf
A standard sourdough loaf uses about 460g of flour, 340g of water, 9g of salt, and 92g of ripe sourdough starter (which itself is just flour and water). Flour is by far the biggest expense, and the brand you pick creates the widest cost swing.
Store-brand all-purpose flour runs about $2.49 for a 5-pound bag (around 2,270g). At 460g per loaf, that’s roughly $0.50 worth of flour. A premium brand like King Arthur costs closer to $6.99 for the same size bag, pushing the flour cost to about $1.42 per loaf. Salt and water add a few pennies at most. So your total ingredient cost lands between $0.55 and $1.50 per loaf, with flour quality being the main variable.
Store-brand flour works perfectly fine for sourdough. The protein content matters more than the label, and many store brands fall in the 10 to 12 percent range, which is adequate for a good rise. If you’re baking frequently and watching costs, this is the easiest place to save.
Starter Maintenance Costs
Your sourdough starter needs regular feeding, and that flour adds up over time. A common approach is keeping about 150g of starter in the fridge and feeding it once a week. Each feeding typically uses around 50g of flour and 50g of water after you discard or use the excess. That’s roughly 200g of flour per month just for upkeep, costing between $0.22 (store brand) and $0.62 (premium brand) monthly.
If you bake weekly, you’re already using the starter as part of your feeding cycle, so the maintenance cost folds into your per-loaf calculation. The real waste comes when you’re not baking regularly but still feeding your starter. Using the discard in pancakes, crackers, or pizza dough helps offset that cost instead of throwing it away.
Energy Cost for Baking
Sourdough baking typically requires preheating your oven to around 450°F and baking for 45 to 60 minutes, which means the oven can be running for up to two hours total including preheat time. A modern electric oven uses about 2,400 watts on medium to high heat. At the national average electricity rate of roughly $0.16 per kilowatt-hour, a two-hour bake session costs about $0.75 to $0.80.
That energy cost stays the same whether you bake one loaf or two. Baking two loaves at once and freezing one effectively cuts your energy cost per loaf in half, down to about $0.40. If you’re baking regularly, this is one of the simplest ways to improve your cost per loaf. Gas ovens tend to run slightly cheaper per session, though the difference is modest.
Small Extras That Add Up
Parchment paper is the most common recurring consumable. A pack of 120 sheets runs about $19, which works out to roughly $0.16 per sheet. A reusable silicone baking mat eliminates this cost after the initial purchase of $10 to $15. If you use a Dutch oven (the most popular method for home sourdough), you likely already own it, but if not, a basic one costs $30 to $60 and lasts essentially forever.
Other one-time tools like a kitchen scale ($10 to $20), a bench scraper ($5 to $8), and a bread lame or scoring razor ($8 to $12) don’t factor into per-loaf cost after you’ve bought them. Spread across hundreds of loaves, they’re negligible.
Total Cost Per Loaf
Here’s the realistic range for a single loaf:
- Budget approach (store-brand flour, two loaves per bake): about $1.00 to $1.25 per loaf
- Mid-range (premium flour, single loaf per bake): about $2.25 to $2.75 per loaf
- Higher end (specialty flour, parchment, single loaf): about $2.75 to $3.25 per loaf
None of these include your time, which is the honest caveat of homemade sourdough. A typical loaf requires 20 to 30 minutes of hands-on work spread across a day of intermittent stretching, folding, and shaping, plus an overnight cold ferment in the fridge. It’s not labor-intensive, but it does require planning.
How This Compares to Store-Bought
A basic sandwich-style sourdough from a grocery store costs $4 to $6. An artisan loaf from a bakery runs $8 to $12 depending on where you live, with prices hitting $10 or more in cities like San Francisco or New York. Homemade sourdough at its most expensive is still cheaper than even the grocery store option, and at its cheapest, it’s roughly a tenth the price of a bakery loaf.
The savings become significant if you bake weekly. At one loaf per week using store-brand flour and two-loaf batches, you’d spend roughly $65 per year on bread. Buying a comparable bakery loaf weekly would run $400 to $500. That’s a savings of $335 to $435 annually, which comfortably covers every tool and accessory you’d ever need for sourdough baking in the first year alone.