How to Hire and Manage Subcontractors Without Losing Your Mind (or Your Money)
Finding reliable subs, setting clear expectations, and building a crew you can count on project after project.
The $60K Kitchen and the Sub Who Disappeared
You land a $60,000 kitchen remodel. Demo day arrives. Your tile guy does not. No call, no text, no explanation. You scramble to find a replacement, lose three days, eat the cost of rescheduling your plumber and electrician, and spend the next week apologizing to a homeowner who now questions whether they hired the right GC.
If you have been in this business long enough, you have a version of this story. Maybe it was a framer who walked off a job. Maybe it was a plumber who passed inspection on the rough-in but left fittings that leaked two weeks after move-in. Maybe it was a painter who sent a crew that clearly had never held a sprayer before.
Bad subs do not just cost you money on the current job. They cost you referrals, reviews, and sleep. Good subs do the opposite. They make you look brilliant, keep your schedule tight, and let you take on more work without growing your payroll.
This guide covers how to find them, vet them, manage them, pay them, and when necessary, replace them.
Your subcontractors are your business. On most residential projects, subs perform 80% or more of the actual labor. The quality of your subs is the quality of your work. Hiring and managing them well is not a side skill. It is the skill.
Where to Find Good Subcontractors
The best subs are rarely found on job boards or Craigslist. They are busy, and they get their work through relationships. Here is where to actually find them.
1. Referrals from Other Contractors
This is the gold standard. Ask GCs and specialty contractors you trust who they use. A plumber who comes recommended by three different contractors you respect is worth more than 50 online profiles. The catch: you need to be the kind of contractor other people want to refer subs to. If you are known for slow payments or chaotic job sites, good subs will hear about it before you ever call them.
2. Supply Houses
The counter staff at your local electrical, plumbing, or lumber supply house knows every contractor in town. They see who buys quality materials, who pays their bills, and who shows up consistently. Ask them. Say: “I need a solid tile installer. Who comes in here that you would actually hire yourself?” Supply house recommendations are underrated because they come from people who see the full picture of how a contractor operates.
3. Trade Associations and Union Halls
Local chapters of NARI, NAHB, or trade-specific associations maintain member directories. Union halls can connect you with journeyman-level tradespeople for specific projects. The advantage here is built-in accountability. Members have reputations within the organization, and nobody wants to be the guy who got kicked out for shoddy work.
4. Building Inspectors
Inspectors see every contractor’s work in your area. They know who passes first time and who needs three callbacks. They cannot officially recommend anyone, but if you build a respectful relationship, most will tell you who does good work.
5. Job Sites
When you drive past a well-run job site with clean staging, organized materials, and crews that look like they know what they are doing, stop and introduce yourself. Ask who the sub is. Some of the best working relationships in construction start with one contractor noticing another contractor’s work and making a cold introduction.
6. Your Existing Subs
Good tradespeople know other good tradespeople. Your best electrician probably knows a reliable HVAC installer. Ask your current subs who they would recommend in other trades. Birds of a feather.
The Vetting Checklist (Do This Before You Hire Anyone)
A referral gets someone to your door. Vetting decides whether they come inside. Skip this process and you are gambling with your license, your liability, and your reputation.
License Verification
Check their license number against your state’s contractor licensing board. Confirm it is active, the correct classification for the work, and has no disciplinary actions. This takes five minutes online. There is no excuse for skipping it.
Insurance Coverage
Require a current certificate of insurance (COI) showing:
- General liability with adequate limits (minimum $1M per occurrence for residential work)
- Workers compensation for all employees (required in most states)
- Your company listed as additional insured on their GL policy
Call the insurance company directly to verify the policy is active. Do not accept expired certificates or promises that “it is being renewed.” If they cannot produce current insurance, they do not work on your jobs. Period.
References and Past Work
Ask for three references from GCs they have worked with in the last 12 months. Call every one. Ask specifically:
- Did they show up when they said they would?
- Did the work pass inspection the first time?
- Were there any callbacks or warranty issues?
- Would you hire them again?
Also ask to see photos of completed work. If a sub cannot show you examples of their recent projects, that tells you something.
Financial Stability
A sub who is one bad month away from bankruptcy is a sub who will cut corners, juggle your materials to another job, or disappear mid-project. Ask how long they have been in business. Check for liens or judgments. Look them up on your state’s court records. A pattern of lawsuits or unpaid debts is a pattern that will eventually include your project.
Communication Style
Pay attention to how they communicate during the vetting process. Do they return calls promptly? Do they show up to the walkthrough on time? Do they ask good questions about the scope? How someone behaves when they are trying to win your business is the best version of themselves you will ever see. If they are slow to respond now, they will be worse once they have the job.
Active license, current insurance with you as additional insured, and verifiable references. If any of these three are missing, walk away. No exception, no matter how good the price or how desperate you are for help.
The Subcontractor Agreement (Your Most Important Document)
A handshake is not a contract. A text message is not a contract. Even a detailed email is a weak substitute for a proper subcontractor agreement. Every sub on every job gets a written agreement. Here is what it should cover.
Scope of Work
Be painfully specific. “Install tile in master bathroom” is not enough. “Furnish and install 12×24 porcelain floor tile (200 sq ft), 4×16 ceramic subway wall tile (180 sq ft), waterproof membrane on shower walls and floor, all trim pieces, and grout. Tile supplied by GC, all other materials supplied by sub.” The more specific the scope, the fewer arguments about what was and was not included.
Payment Terms
Specify the total price, the payment schedule (milestones or progress payments), and the payment method. Include when invoices are due and when payment will be made. “Net 15 from approved invoice” is clear. “I will pay you when the job is done” is not.
Timeline and Schedule
Include the start date, the expected completion date, and any milestone dates that affect other trades. If the tile needs to be done before the cabinet installer shows up on the 15th, put that in writing.
Insurance Requirements
State the minimum coverage amounts and require a COI to be on file before work begins. Include a clause that allows you to withhold payment if insurance lapses during the project.
Change Order Process
Define how changes will be handled. All changes must be in writing, approved by you before work begins, and priced before approval. This prevents subs from doing extra work and billing you for it later.
Quality Standards and Inspection
State that all work must meet applicable building codes and manufacturer installation specifications. Include your right to inspect work at any point and require rework at the sub’s expense if it does not meet standards.
Warranty
Define the warranty period for labor (one year is standard for residential). Specify that the sub is responsible for any defects discovered during the warranty period at no additional cost.
Termination Clause
Include the conditions under which either party can terminate the agreement, the notice required, and how payment will be handled for completed work if the agreement is terminated early.
Managing Subs on the Job
Hiring a great sub is only half the equation. Managing them well is what turns a good tradesperson into a reliable long-term partner.
Set Expectations Before Day One
Walk the job with your sub before they start. Review the scope in person, point out anything unusual, discuss access, parking, material storage, and site rules. Introduce them to the homeowner if applicable. Ten minutes of alignment up front saves hours of correction later.
Communicate Proactively
Do not wait for problems to surface. Check in daily on active projects, even if it is a quick text. “How is it going today? Anything you need?” goes a long way. Subs who feel supported perform better than subs who feel micromanaged. There is a difference between checking in and hovering.
Schedule Coordination
The number one source of conflict between subs is scheduling. When trades overlap without coordination, everybody suffers. Give each sub a clear window and communicate any changes immediately. If the drywall crew runs a day long and it pushes the painter back, tell the painter that day, not when they show up to an unfinished job.
Quality Checkpoints
Build inspection points into your workflow. Check rough-in work before drywall goes up. Check tile layout before mortar goes down. Check paint prep before the first coat. Catching problems early is a five-minute fix. Catching them after the fact is a rework nightmare. Document everything with photos as you go.
Documentation
Take photos of work in progress. Save all text messages and emails. Note any verbal conversations in a daily log. If a sub promises to fix something by Friday, send a text confirming it: “Just confirming you will have the flashing repaired by Friday the 18th.” This is not paranoia. This is professionalism. Documentation protects you, protects the sub, and protects the client.
Handle Problems Immediately
If you see substandard work, address it the same day. Do not wait until the end of the project. Be direct but professional: “This grout line is not straight. I need this section redone before you move to the next wall.” Good subs respect direct feedback. Bad subs make excuses. Either way, you need to know which one you are dealing with sooner rather than later.
Payment Best Practices
How you pay your subs determines whether they want to work with you again. Pay fairly, pay on time, and protect yourself in the process.
Milestone-Based Payments
For larger subcontracts, tie payments to completed milestones rather than calendar dates. Example for a framing sub on a new build:
- 25% after first floor walls are framed and stood
- 25% after second floor and roof framing complete
- 25% after sheathing installed
- 25% after final inspection passed
Milestone payments keep the sub motivated to hit benchmarks and give you natural checkpoints for quality review before releasing money.
Retainage
Retainage (holding back 5-10% of each payment until project completion) is standard on commercial work and appropriate on larger residential projects. It ensures the sub returns to fix punch list items and address any warranty issues in the first weeks after completion. Be upfront about retainage in the agreement. Nobody likes surprises when the invoice gets paid.
Lien Waivers
Get a signed lien waiver with every payment. A lien waiver is the sub’s acknowledgment that they have been paid for the work covered. Without it, a sub can file a mechanic’s lien against the property even after you have paid them. There are two types: conditional (effective upon payment clearing) and unconditional (effective immediately). Use conditional waivers until the final payment, then get an unconditional waiver at close-out.
Pay On Time
This is the single easiest way to build loyalty with good subs. If your agreement says Net 15, pay on day 14. If you are waiting on a draw from the client, communicate that to the sub proactively. Subs talk to each other. Being known as a GC who pays on time means you get first priority when schedules are tight. Being known as a slow payer means you get the B team, or you get ghosted entirely.
Track Every Dollar
Keep records of every payment to every sub on every job. Track invoices, payment dates, lien waivers, and any back-charges for defective work. When you are running multiple projects with multiple subs, it is easy to lose track. A missed payment damages a relationship. A duplicate payment damages your margin.
Never pay for work you have not inspected. Never release final payment without a signed unconditional lien waiver. Never skip retainage on projects over $25,000. These three habits will save you from the vast majority of subcontractor payment disputes.
When to Fire a Sub (and How to Do It Without Burning Bridges)
Not every sub relationship works out. Knowing when to cut ties and how to do it professionally is a skill every GC needs.
Fire Immediately If:
- Safety violations – any sub who puts workers or occupants at risk gets one warning for minor issues and zero warnings for major ones. A worker on a roof without fall protection? That sub is done today.
- Insurance lapse – if their coverage expires and they cannot produce a current COI within 24 hours, they are off the job. You cannot afford the exposure.
- No-show with no communication – one unexplained no-show is a serious conversation. Two is a termination.
- Dishonesty – if a sub lies about materials used, hours worked, or license status, the trust is gone. Move on.
Have a Conversation First If:
- Consistent schedule slips – if they are reliable in quality but struggle with timing, a direct conversation may solve it. Some subs are overcommitted and need to hear that your work requires dedicated time.
- Quality decline – if a previously good sub starts producing mediocre work, something has changed. Maybe they lost a key employee, or they are dealing with personal issues. Ask before you assume.
- Communication breakdown – if they stopped returning calls or providing updates, tell them what you need and give them a chance to adjust.
How to Terminate Professionally
Reference the termination clause in your agreement. Be direct: “This is not working out. Here is where we stand on payment for completed work. I will need you off the site by [date].” Do not get into a lengthy debate about fault. Keep it factual and businesslike.
Pay them for completed, acceptable work. Do not withhold payment as punishment. That creates legal problems and guarantees a burned bridge.
Document the reasons for termination in case of future disputes. A short written summary sent by email (“As discussed today, we are terminating our subcontract agreement effective [date] for the following reasons…”) protects both parties.
The Long View
Construction is a small world. The sub you fire today might be working next to you on a commercial project next year. Handle terminations with the same professionalism you bring to the rest of your business. No trash-talking, no social media posts, no badmouthing them to other contractors. State the facts if someone asks, but keep it professional.
Frequently Asked Questions
How many subcontractors should I have for each trade?
At minimum, two for every trade you regularly use. Your primary sub handles most work, and your backup steps in when schedules conflict or quality drops. For high-volume trades like framing and drywall, three deep is even better. One reliable sub getting hurt or retiring can shut down your pipeline if you have no backup.
Should I use a subcontractor agreement even for small jobs?
Yes. A one-page agreement covering scope, pay, timeline, and insurance is sufficient for small jobs. The size of the job does not change the risk. A sub who damages a client’s property on a $2,000 job creates the same liability as on a $200,000 job. The agreement takes 10 minutes. The lawsuit takes 10 months.
What is the difference between a subcontractor and an employee?
The IRS uses three categories to determine classification: behavioral control (do you dictate how the work is done or just the result?), financial control (does the worker have their own tools, insurance, and business expenses?), and relationship type (is there a written contract, and are benefits provided?). If you control the how, not just the what, they may legally be an employee. Misclassification carries serious tax penalties. When in doubt, consult an accountant or employment attorney.
How do I handle a sub who does good work but is always late?
Have a direct conversation first. Some subs are overbooked and honest about it, while others do not realize it is a problem. If talking does not fix it, build consequences into the agreement. Include a start date with a per-day penalty for late starts, or require 48-hour confirmation before scheduled start dates. If the pattern continues, move them to backup status and find a primary who respects your schedule.
Do I need to verify a sub’s insurance before every project?
You need a current certificate of insurance on file, and you should verify it has not lapsed at least once per year. Insurance policies can be canceled mid-term without notice to you unless you are listed as an additional insured. Require your subs to add you as an additional insured on their general liability policy so you get notified if the policy is canceled or lapses.
What should I do if a sub’s work fails inspection?
The sub fixes it at their expense. This should be explicit in your subcontractor agreement: all work must meet applicable building codes and pass inspection, and any rework required to pass inspection is the sub’s responsibility at no additional cost. If a sub pushes back on fixing failed inspections, that is a sub you do not use again.
Build Better Estimates for Every Project
Accurate estimates keep your subs paid on time and your margins protected. SimplyWise helps contractors generate professional estimates in seconds so you can focus on managing the work, not the paperwork.