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Record subcontractor costs and schedule in the job record
Your actual margin is visible in real time — not discovered at invoicing when it is too late to adjust.
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Guided operating lesson
When to Subcontract and When to Decline
Make clear, confident decisions about taking on work that requires subcontractors — without overextending or damaging your reputation.
Growth and Teaming20 minIntermediate
Who this is for
Sole operators who are being asked to take on more work than they can do alone, and need to decide whether to subcontract or decline.
Why it matters
Taking on work you need subbies for changes your risk profile, your management load, and your margin. Doing it well can grow your business. Doing it poorly can damage your reputation and your finances.
Lesson outcome
A decision framework for evaluating whether to subcontract on a given job, and what conditions need to be in place before you do.
Real-world problem
The subcontracted job that went sideways
A painter wins a large commercial job and subcontracts the ceiling work to a tradesperson he knows casually. The subcontractor does poor work on 30% of the ceiling, misses a day without notice, and the client complains directly to the painter. He spends two days correcting the work himself at no charge. The final margin on the job is negative. He had no written subcontract, no pre-vetting process, and no quality check protocol.
Why this happens
The opportunity looks bigger than the management overhead
Subcontracting appears to multiply capacity. But it also multiplies management load, quality risk, and margin exposure. The opportunity calculation often underweights these.
The decision is made on optimism, not conditions
Most subcontracting decisions are made on trust or familiarity rather than clear criteria: Can this subcontractor actually do this work? Do I have the capacity to manage them? Does the margin support it?
Professional standard
Subcontract only when the conditions are right
Right conditions: you have used this subcontractor before or vetted them, the margin supports the management overhead, and you have the capacity to supervise the quality of their work.
You are responsible for everything done under your name
From the client's perspective, there is only one contractor — you. Your subcontractor's quality, behaviour, and safety compliance are your liability. Manage accordingly.
Step-by-step operating system
Subcontracting decision framework
1
Assess the margin after subcontracting costs
Calculate the full subcontractor cost including your management time, any quality supervision, and a contingency for rework. Does the remaining margin justify the risk and overhead?
2
Assess your management capacity
Can you visit the site to quality-check the subcontractor's work? Do you have the time to coordinate their schedule, materials, and access? Subcontracting without supervision is a reputation risk.
3
Assess the subcontractor's track record
Have you worked with them before? Have you seen their work? Do they have their own insurance? Would you vouch for their quality to your client? If not, do not use them on a job under your name.
4
Decide: take on, subcontract with controls, or decline
If the margin, management capacity, and subcontractor quality all check out — proceed. If any condition is missing — decline the job or find a better subcontractor before committing.
BuilderBuddi: Log your subcontractor assessment in the job notes in BuilderBuddi before proceeding.
BuilderBuddi workflow cards
Manage subcontracted jobs with clear records in BuilderBuddi
Using BuilderBuddi to track subcontractor schedules, costs, and quality notes creates accountability and protects your margin visibility.
Suppliers
Create a supplier record for each subcontractor you use
A searchable record of subcontractors, their trade, and notes about past performance.
Open in BuilderBuddiThe builder offered a big job he cannot do alone
Context: A builder is offered a $120,000 project that requires three trades he cannot perform himself. It is the largest job he has ever been offered.
Challenge: He needs to decide whether the management capacity, margin, and subcontractor quality conditions are all in place before accepting.
Recommended response: Do the margin calculation first with realistic subcontractor costs. Then assess whether you can manage three subcontractors simultaneously while maintaining quality. If either fails, decline or negotiate scope before accepting.
- • Calculate the full cost including subcontractor estimates + 10% contingency
- • Identify the subcontractors you would use — have you worked with them?
- • Estimate your own management hours and build them into the cost
- • If margin and conditions are acceptable, accept — and document everything from day one
Field notes
- • The word "subcontractor" does not dilute your liability in the client's eyes. It amplifies your management responsibility.
- • The cheapest subcontractor is almost never the right choice when your reputation is the product.
- • Declining a job you cannot deliver well is better for your reputation than delivering it poorly.
- • Management overhead on subcontracted work is consistently underestimated. Build it into your price.
Key takeaways
- Subcontract only when margin, management capacity, and subcontractor quality all check out.
- You are fully responsible for everything done under your name — plan and price accordingly.
- Declining a job you cannot do well is a reputation-protecting decision.
- Management time on subcontracted jobs must be priced in, not treated as free.
Common mistakes
Subcontracting without checking the subcontractor's prior work
Consequence: Poor quality work reflects on you. Client complaints, rework costs, and reputation damage are your problem regardless of who did the work.
Prevention: Only use subcontractors whose work you have seen directly or who come recommended by someone whose standards you trust.
Not including management time in the subcontracted job price
Consequence: You deliver the job, manage the subbies, fix the issues — and discover the margin covered the work but not your time.
Prevention: Estimate your management hours and include them as a line in your cost structure when pricing subcontracted work.
Accepting a job before checking subcontractor availability
Consequence: You commit to a client start date and then discover your subcontractor is unavailable. You either delay the client or use an unknown subcontractor in a rush.
Prevention: Confirm subcontractor availability before committing to a client start date.
Complete this in BuilderBuddi
Implementation checkpoint
Tick these only when the real business output exists. This keeps Blueprint tied to work done, not pages viewed.
0% complete
Decision point 1: You are offered a job with a 15% margin if you self-perform but only 6% if you subcontract the specialist work. Should you subcontract?
Practical action
Review the last job where you used a subcontractor. Apply the three-condition check retrospectively: was the margin adequate? Did you have supervision capacity? Was the subcontractor quality verified? Identify what you would do differently.
Worksheet prompt
For your next or most recent subcontracted job: what is the gross margin after ALL subcontractor costs? What is your estimated management time, costed at your hourly rate? What is the adjusted net margin? Is it worth the risk?
Worksheets and templates
Subcontractor Assessment Checklist
ChecklistA vetting checklist for evaluating subcontractors before using them on a job under your name.
Ready for immediate use
Related operating playbooks
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