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Fishing Quota Calculator

Individual fishing quota from total allowable catch.

About this calculator

In quota-managed fisheries, regulators set a Total Allowable Catch (TAC) for the season and then divide it among rights-holders according to quota shares — this calculator does that division for you. Your individual quota is simply your share of the total shares outstanding, applied proportionally to the TAC: (your shares ÷ total shares) × TAC, expressed in both tonnes and kilograms, alongside your share as a straight percentage of the fishery. From there it estimates two ways you could realize value from that quota. Revenue potential is what you'd earn landing your full quota at the given price per kilogram — effectively a best-case, full-utilization figure that assumes you can actually catch and sell every kilogram you're allocated.

Lease value is the alternative: many quota systems allow shares to be leased out to other fishers for a per-kilogram rate, letting a quota holder monetize an allocation without ever putting a boat on the water. The "fishing vs. lease" figure is simply the gap between those two — the incremental revenue from fishing your quota yourself rather than leasing it away — but it's a gross comparison only: it doesn't subtract the fuel, crew, and gear costs of actually going fishing (see the Fishery Economics calculator for that side of the ledger), so the real breakeven between fishing and leasing is narrower than this number alone suggests. Quota share values and TAC levels also change season to season as regulators respond to stock assessments, so treat both inputs as figures to update each year rather than fixed constants.

Inputs

Results

Your quota (tonnes)

250

Share of TAC (%)2.5
Revenue potential ($)$875,000.00
Lease value ($)$200,000.00
Fishing vs lease ($)$675,000.00
How to Use This Calculator
  1. Enter TAC (tonnes), Total quota shares, and Your shares.
  2. Set Fish price ($/kg) and Quota lease rate ($/kg).
  3. Review the Your quota (tonnes) result.
  4. Use Share of TAC (%) and Revenue potential ($) ($) to inform your decision.

How the result changes with Total quota shares

Total quota sharesYour quota (tonnes)
500500
750333.33
1,500166.67
2,500100

What each input means

TAC (tonnes)
Total Allowable Catch in metric tonnes.
Total quota shares
Total quota shares in the fishery.
Your shares
Number of quota shares you hold.
Fish price ($/kg)
Expected landing price per kilogram.
Quota lease rate ($/kg)
Market rate for leasing quota per kg.

What each result means

Your quota (tonnes)
Your individual transferable quota allocation.
Share of TAC (%)
Your percentage of the total allowable catch.
Revenue potential ($)
Maximum revenue if you catch your full quota.
Lease value ($)
Value if you lease your quota to another fisher.
Fishing vs lease ($)
Additional revenue from fishing versus leasing.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    TAC (tonnes) = 10000, Total quota shares = 1000, Your shares = 25, Fish price ($/kg) = 3.5 = 5 input(s) provided
  2. Calculate Your quota
    Your quota = round((yourShares / totalShares) * tacTonnes * 1000) / 1000
    250 = 250
  3. Calculate Share of TAC
    Share of TAC = round((yourShares / totalShares) * 10000) / 100
    2.5 = 2.5
  4. Calculate Revenue potential
    Revenue potential = round(yourQuotaKg * pricePerKg * 100) / 100
    875000 = $875,000

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.

Frequently Asked Questions

How exactly is my individual quota calculated from the TAC?

The calculator takes your shares divided by total shares outstanding to get your ownership percentage, then applies that percentage directly to the Total Allowable Catch: (yourShares ÷ totalShares) × tacTonnes. The result is your individual quota in tonnes, converted to kilograms for the revenue and lease calculations that follow.

What's the real difference between revenue potential and lease value?

Revenue potential assumes you catch and sell your entire quota yourself at the entered price per kilogram — a full-utilization, best-case figure. Lease value instead assumes you transfer your quota allocation to another fisher for a per-kilogram lease rate without ever fishing it, which is a common way to monetize quota you don't have the capacity or interest to fish.

Why doesn't the fishing-vs-lease figure tell me which option is actually more profitable?

Fishing vs lease is simply revenue potential minus lease value — the gross revenue gap between the two paths. It doesn't subtract the fuel, crew, and gear costs of actually going fishing, so it overstates the real advantage of fishing your own quota; you'd need to net those trip costs out (see the Fishery Economics calculator) to find the true breakeven between fishing and leasing.

What happens to my results if I hold zero quota shares?

With yourShares at 0, your individual quota, share percentage, revenue potential, and lease value all calculate to zero, since every one of those outputs is directly proportional to your share count. The calculator clamps yourShares so it can never exceed totalShares, keeping your allocation within the bounds of the fishery's total quota pool.

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