"Is BSF profitable?" is the wrong question

01 · The frame

The wrong question

I get asked it most weeks, and the honest answer is that it has no answer. There is no BSF business. There are BSF cases, and they do not share a verdict.

Anyone telling you the numbers don't work is usually right — about the case they looked at. Anyone telling you they do work is usually right about theirs. Both are describing one site and calling it an industry.

02 · The order

The order is the whole point

So here is the order I actually work in. The order is the whole point, because each step constrains the next.

03 · The steps

Waste, markets, costs and law

First the waste. How much, how consistent, what quality — and what the producer pays today to make it disappear.

Second the output markets. What larvae and frass genuinely sell for locally, not what a global index says. Those prices are more predictable than soy, which is why I price them before I cost anything.

Third the local cost base. Wages and electricity, in absolute terms. Labour-share percentages get quoted constantly — 15%, 62% — and they settle nothing. What moves a case is the wage rate, not the share.

Fourth the law. Whether the rules let you feed that specific stream to larvae, and then sell what comes out of them.

04 · The gate fee

The gate fee is the answer

Only then the gate fee. And only as the answer — never the assumption. What we solve for is the minimum gate fee that makes this specific case profitable.

That reversal is what most business plans get backwards. A gate fee typed into the top of a spreadsheet is a wish. A gate fee that falls out of the bottom is a finding.

05 · Two consequences

Zero is a gate fee

Two consequences worth saying plainly.

Zero is a gate fee. In markets with no established waste charging the honest answer is usually zero, and that is a result, not the absence of one. Plenty of cases close there, funded by the protein and the frass.

And one city can carry wildly different prices for what looks like the same material. General municipal waste in a $15–20 per tonne band, putrescible food waste priced roughly ten times higher, same municipality, same week. "The gate fee in that country" is not a number.

06 · The case

What it does to a real case

What that does to a real case: on a tropical 5 tonne-a-day reference, running cost lands near $43 per tonne of waste while larvae at soy parity return about $48 — so processing the waste for free already works. Add $20 a tonne of gate fee and payback moves from roughly 13.6 years to 2.7.

Same plant. Same biology. One variable. Investable, or not.

07 · Over to you

The numbers are not chosen

Part 1 said architecture is an output of the work, not the input. So is the gate fee. So is nearly every number this sector argues about as though someone got to choose it.

If you have a case in front of you — do you know what the waste producer pays today to get rid of that stream? Not the published tariff. The number they actually pay.

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