Selling and marketing
How to Make Sourdough Starter to Sell: Cost per Jar
A day by day plan for a sellable starter, plus the cost per jar and the price that leaves a real margin.
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What to remember
- One base starter can fill many jars. Grow it once, then feed and split on a set day.
- The jar, the label, and your minutes cost more than the flour does.
- Date every jar you sell. A buyer cannot judge a living product without a date.
- Price per jar, not per ounce, so the math is easy to say at a table.
Knowing how to make sourdough starter to sell comes down to two jobs. The first is growing something strong and steady. The second is turning it into jars with a cost and a price you can defend. This guide starts with the second job, because that is the part that pays you.
How long does a starter take before you can sell it
A new starter needs a run of daily feeds before it is strong enough to carry your name. That stretch is pure cost: flour goes in, nothing comes out. Pick a feed time you are home every single day, and treat it like a standing appointment you do not move.
Do not sell from the first good rise. Wait until the base behaves the same way after several feeds in a row. A steady base is the whole product. A wobbly one turns into messages from unhappy buyers and free replacement jars at your expense.
Pick your feed time
Choose an hour you are home every day, morning or evening. A set time stops you forgetting and keeps the base steady.
Grow the base starter
Feed on schedule until the base rises the same way several days running. This is the waiting period, and it costs flour, not sales.
Split into sellable jars
Once the base is steady, divide it. Keep the mother jar for yourself and fill only the jars you have orders for.
Label with both dates
Write the date you last fed the base and the date you filled the jar. Add your name and a number where you answer.
Cost one jar before you price it
Add the flour, the jar, the label, and the minutes of your time. That total is your floor, not your price.
Set the price and list it
Round to a clean number, then check it against what your own market already pays for a jar that size.
What one sellable jar actually costs you
Flour is the smallest line on the card. The jar and lid usually cost more, and a printed label adds a little again. Then there is your time, which is the line most home sellers leave off entirely.
Count your minutes honestly. Feeding, splitting, wiping jars, printing labels, and answering messages all belong to the jar in the buyer’s hands. If a jar takes ten minutes of your day, that is ten minutes you are not spending on anything else that earns.
Packaging is where new sellers get surprised. A jar, a lid, a label, and a paper bag can eat a large share of a small price. Weigh that against the price before you commit to a jar size.
A worked example: one jar, every cost, real margin
Say a 5 pound bag of flour costs $4.50 and a glass jar with a lid costs $1.20. A printed label runs about 15 cents. The flour inside one jar, plus the flour you threw away growing the base, comes to 55 cents. Twelve minutes of your time at $15 an hour is $3.00. Power, water, and cleanup add 40 cents. That is $5.30 a jar before you have earned a thing.
List that jar at $12 and you keep $6.70 after ingredients, packaging, time, and overhead. Ten jars a week is $67 of margin. The arithmetic holds at any price you choose: add those four costs first, then look at what is left.
Brevl is $20 a month flat with no cut of your sales. At that $6.70 margin, the fee is covered by fewer than three jars. Recipes with real costing, ingredient inventory, and a weekly planner sit in the same place you take orders and get paid.
Mistakes that cost you money
Selling a wet jar with no date on it is the second mistake. The buyer cannot tell how fresh it is, so they assume the worst. A date and a feed note cost you seconds and settle the question.
Undercharging to beat someone else is the third. You cannot see their costs and they cannot see yours. Price from your own numbers and let theirs stay theirs.
One more: buying a hundred jars before you have sold ten. Packaging ties up cash you could spend on flour. Buy in small lots until orders are steady, then buy bigger and ask for a better price.
And never sell a jar you would not buy yourself. If it is sticky, half full, or the label is lifting, fix it or drop it. A careless jar costs you the next order too.
What to check before you list a jar
Your state sets what you may sell from a home kitchen and what has to appear on the label. Look up the cottage food rules for your state and keep a copy of what you find. How to legally sell sourdough walks through permits and labels.
Then check your own market. Ask at the farmers market whether starter is already on a table, in what size, and at what price. If you plan to mail jars, read how to dehydrate sourdough starter to sell first, because the packing and the cost both change.
What goes on the jar and the note
Write the date you last fed the base and the date you filled the jar. Add your name and a phone number or email you actually answer. A short card with one line about feeding saves you a dozen messages a week.
Keep the note short. What it is, when it was fed, how to reach you. A card nobody finishes reading helps no one. Print labels in small runs at first, because a hundred labels for a design you change after ten jars is money in a drawer.
Price the jar, not the ounce
A clean number per jar is easier to say out loud at a table and easier for a buyer to compare. Do the ounce math for yourself, not for the sign.
Set the price from your four costs plus a margin you are glad to earn, then check it against what your market already pays. If the two are far apart, change the jar size or the packaging before you cut your own pay. How much to sell a sourdough starter for has the full price math, and how to calculate cost of sourdough starter covers the weekly feed cost.
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Common questions
How much starter should go in one jar?
Pick a jar size you can fill the same way every time, and put the weight on the label. Buyers compare jars by weight, so a steady amount makes your price easy to judge. Change the size only when you are ready to reprint every label.
Can I sell starter from my home kitchen?
Your state decides that. Look up the cottage food rules for your state before you list a jar, and keep a copy of what you find. Those rules set what you may sell and what your label has to say. Ask your local health department if the wording is unclear.
How long will a jar last?
A starter is alive, so the date on the jar is what the buyer goes by. Tell them the day you last fed it and the day you filled it. Ask them to feed it as soon as they get it home rather than leaving it on the counter.
Should I dry the starter before I sell it?
Dry it if you plan to mail jars or keep stock on a shelf. Wet jars suit local pickup and hand delivery. The drying guide walks the steps and the added cost, and it is worth reading before you buy any packaging.
What if nobody buys at my price?
Change the jar, not your pay. A smaller jar or a plain lid lowers the cost without asking you to work for free. Then test the new price at one market before you print a new label run. Keep your time in the math either way.
General information, not legal or tax advice. Rules vary by state, so check your own state's cottage food guidance before you sell.