Decide whether thin-margin work is worth taking by comparing incremental contribution, scarce capacity, cash exposure and evidenced follow-on value.
Short answer: Accept it only when the job leaves positive contribution after every extra cost, uses capacity that would otherwise remain idle, does not displace higher-contribution work, and has payment terms that fund the outlay. Put a quantity or date limit on the exception. If the work consumes a scarce hour for less than its next-best use, reject or reprice it even when the invoice covers materials.
The argument often gets trapped between two slogans. “Revenue is better than nothing” ignores delivery and opportunity cost. “Every job must carry its full share of overhead” can cause you to reject useful contribution when rent and salaries will be paid anyway.
Both contain part of the truth. A short-term incremental decision and a sustainable pricing decision are not the same. Thin-margin work can improve one quiet week while weakening the business if it becomes the normal offer.
Use the Incremental Value Screen
The Incremental Value Screen tests the job across five dimensions. It must pass the first four. The fifth can strengthen the decision, but it cannot rescue negative contribution.
- Incremental contribution: Question: What cash remains after costs caused by this job?; Pass condition: More than £0, with error allowance; Evidence required: Quote, bill of materials and paid time
- Capacity displacement: Question: What else could use the constrained hours?; Pass condition: Job contribution exceeds credible next-best contribution; Evidence required: Booked work and weighted live pipeline
- Cash exposure: Question: Do payment terms fund delivery safely?; Pass condition: Deposit or available cash covers the peak gap; Evidence required: Dated receipts and payments
- Price containment: Question: Will the exception stay exceptional?; Pass condition: Defined customer, quantity, scope and end date; Evidence required: Written terms and normal future price
- Evidenced option: Question: Does it create a measurable next opportunity?; Pass condition: Contracted repeat, useful learning or approved proof; Evidence required: Specific decision and review date
My position is that you should accept thin-margin work only as a controlled use of temporary spare capacity. It is not a customer-acquisition strategy by default and should never occupy the hours that determine your normal output.
Calculate incremental contribution honestly
Start with the price you will actually collect. Subtract materials, packaging, transaction fees, commission, travel, temporary labour, subcontracting, customer-specific setup, expected waste and any other cost that exists only because you take the job.
Do not subtract fixed rent merely because an accountant allocates some to every order. For this immediate decision, rent will be paid whether you accept or decline. Do include a step cost if the order triggers extra space, overtime, equipment hire or another software tier.
Owner time needs careful treatment. Genuinely idle hours may leave immediate contribution positive, but they are not free. Record contribution per owner hour and compare it with selling, improvement, recovery and the minimum return needed for the model.
Add an error allowance where scope or waste is uncertain. A job showing £50 contribution before a plausible £100 rework risk is not safely positive.
Price the constrained resource
Identify the resource that stops you accepting both this work and another job. It may be machine time, founder judgement, an installation crew, a treatment room or a delivery slot.
Calculate contribution per constrained unit for the proposed job and for alternatives. Confirmed work is straightforward. For genuine live opportunities, multiply contribution by a cautious probability based on comparable past proposals. Do not assign 90% because you want the alternative to win.
If nothing else will use the resource before it expires, opportunity cost may be close to zero. A vacant appointment tomorrow cannot be stored. Machine time next month may be preserved if enquiries normally arrive with three weeks’ notice. Timing changes the answer.
Do not fill every empty hour. Protect a stated block for selling and improvement rather than assuming customer work is always the best use.
Model the cash gap, not only final profit
A positive contribution job can still create a dangerous temporary gap. Lay out the dates for deposit, materials, labour, tax and final payment. Calculate the most cash tied up at any point.
Negotiate a deposit or milestone that covers non-recoverable commitments. If the customer cancels, you should not be financing custom materials you cannot reuse. Contract and consumer rules governing deposits, cancellation and refunds vary by country and buyer type. Use clear terms and seek qualified local legal advice for a specific arrangement.
Check concentration and credit risk. A large low-margin order that pays late can threaten wages and supplier relationships. The small surplus does not compensate for an exposure the business cannot absorb.
Worked example: HarbourStitch Embroidery
HarbourStitch receives an order for 250 embroidered tote bags at £5 each. The customer wants delivery during a quiet fortnight.
- Revenue: Calculation: 250 × £5.00; Amount: £1,250.00
- Blank bags: Calculation: 250 × £2.40; Amount: £600.00
- Thread and backing: Calculation: 250 × £0.25; Amount: £62.50
- Packing: Calculation: 250 × £0.20; Amount: £50.00
- Machine consumables and power: Calculation: Estimate from the run; Amount: £25.00
- Courier: Calculation: Quoted charge; Amount: £40.00
- Contribution: Calculation: £1,250 minus £777.50; Amount: £472.50
The run uses 20 embroidery-machine hours, so contribution is £472.50 ÷ 20 = £23.63 per constrained hour. HarbourStitch’s normal work contributes £48 per machine hour.
In scenario one, 30 machine hours are genuinely unused before the delivery date and no suitable proposal is outstanding. The order adds £472.50 towards fixed cost. A 50% deposit is £625, which covers the £600 blank bags but not all £777.50 of incremental outlay. The business must fund a peak gap of at least £152.50 plus timing differences. If it can do that safely, the order passes the first three screens.
In scenario two, two confirmed normal orders need 10 hours each. Together they would contribute 20 × £48 = £960. The tote order would displace them and contributes only £472.50, creating an opportunity loss of £487.50. It should be rejected or moved to a date with idle capacity.
The customer asks for the same £5 price on future orders. HarbourStitch states that the figure applies to 250 identical bags in the named quiet fortnight and gives the normal repeat price before accepting. Without that boundary, a useful one-off contribution could reset the customer’s reference price.
Treat strategic value as a separate return
Founders justify weak work with exposure, learning or future volume. Those benefits can be real, but they need a decision attached.
For learning, name the uncertainty the job will resolve and what you will do with the answer. “Can we complete 250 identical runs with less than 4% setup and reject time?” is measurable. “We will gain experience” is not.
For follow-on value, separate a signed repeat schedule from a customer’s friendly suggestion that more work may come. Do not discount the first order against unsigned future revenue. Price later work when it becomes real.
For proof, obtain permission and specify what may be shown. A logo or testimonial is not payment unless it materially improves a known sales obstacle, and even then it should supplement positive contribution rather than replace it.
Keep the normal price intact
Explain why the exception exists in operational terms: standardised scope, customer-supplied data, a quiet production window, collection instead of delivery or a fixed quantity. This makes the lower amount difficult to compare with the normal service because the conditions differ.
State the normal price or pricing basis for later work before the first order begins. Put the limit in the quote. Do not rely on a future conversation after the discounted figure has become familiar.
Review cumulative exceptions monthly. Ten individually sensible quiet-period jobs can collectively prevent you building a market for the normal offer. Set a maximum share of constrained capacity, such as 15%, as a working limit and change it only with evidence from your demand pattern.
Know when full cost should decide
The incremental screen answers whether one additional job improves the immediate position. It does not set a sustainable standard price. Across a representative quarter, the whole job mix must cover direct cost, fixed overhead, owner pay, tax requirements and profit.
Practitioners disagree about allocating overhead to each job. Full-cost advocates say every job should carry its share, protecting long-term viability. Marginal-pricing advocates say fixed overhead is irrelevant to a spare-capacity decision. My view is to use both at their proper level: incremental contribution for the exception, full-cost recovery for the recurring model.
If thin-margin work exceeds its capacity limit for two consecutive months, it is no longer an exception. Reprice it, redesign it or remove it.
Related guides
Decide within 24 hours
Before accepting, complete the five-screen table with dated evidence. Calculate contribution per constrained hour and compare it with confirmed work, a weighted live pipeline and a protected improvement block. Map the peak cash gap and put the price boundary in writing.
Accept only if the first four screens pass. Schedule a review immediately after delivery to compare quoted and actual cost, hours, payment and any promised option. If actual contribution is below the error allowance or normal work was displaced, do not repeat the exception on the same terms.
Frequently asked questions
Is a job profitable if it covers materials and labour?
It leaves contribution if it covers every extra cost caused by the job, but that is not the same as full profit. The business still has rent, insurance, administration, owner pay and other fixed costs to recover across its job mix. Label the result accurately. Positive contribution can improve a quiet period, while a recurring offer that never carries enough overhead remains unsustainable. Also include transaction fees, travel, waste and rework rather than defining “costs” as the two easiest lines to see.
Should I include overhead when deciding on one extra job?
Use overhead in the overall viability test, but do not pretend one extra job causes rent that will be paid anyway. For an immediate spare-capacity decision, compare price with incremental cost and opportunity cost. Include any step cost the job actually triggers, such as equipment hire or overtime. Then review whether the whole monthly or quarterly mix recovers fixed cost. If exceptions become regular, full-cost economics should determine the price because the work is now part of the normal model.
Can low-margin work help me win a bigger customer?
Possibly, but do not spend contribution against an unsigned promise. Define the next decision: a contracted second order, an agreed review after a paid first batch or access to a named buyer. Calculate the first job on its own and require positive contribution. State future pricing before delivery. Large customers can also create concentration, slow-payment and service demands that make the apparent opportunity less valuable. Treat future volume as evidence only when the customer has made a specific, authorised commitment.
What if the work keeps employees busy during a quiet period?
It can be rational when wages are committed, the job adds positive contribution and it does not interfere with training, maintenance, selling or likely higher-value work. Check whether additional supervision, overtime or error risk changes the calculation. Be honest about morale too: repetitive rush work may create a cost not visible in the quote. Employment requirements vary by country, so any change to hours, duties or pay needs current local advice. Give the quiet-period policy a capacity limit and review date.
How do I estimate the chance of better work arriving?
Use your own comparable pipeline history. Group past proposals by stage and count how many converted within the same lead-time window. Apply that rate to current suitable opportunities, then multiply expected contribution by the probability. A proposal discussed with the decision-maker is not comparable to an unqualified enquiry.
If you have no history, use a low probability and show the answer at several rates. Do not reject certain positive contribution for a vague hope, but do not fill capacity months ahead when normal enquiries reliably arrive later.
Should I tell the customer that their job is low margin?
Explain the commercial conditions, not your internal distress. State that the price applies because scope is standardised, delivery sits in a named window, quantity is fixed or the customer supplies a required input. Give the normal basis for changes and repeats. Telling a customer you make little profit may invite concern about quality or continuity without helping the decision. If the job cannot be delivered responsibly at the price, reprice or decline it rather than asking the customer to manage your economics.
When should I stop accepting thin-margin work?
Stop when it displaces higher-contribution work, consumes the cash buffer, exceeds the capacity limit, creates repeated exceptions or fails to produce the measured option that justified it. Review actual versus quoted contribution after every such job and the cumulative share monthly. A useful working trigger is two consecutive months above your stated exception limit. At that point, the work is part of the model and must pass a full-cost test. Do not wait for the bank balance to force the decision.
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