Subcontractor default insurance (SDI)
In the United States, subcontractor default insurance (SDI), commonly known by its popular brand name Subguard, is a safeguarding tool for contractors to mitigate the risk of their subcontractors defaulting.
Rather than being a guarantee like a surety bond, it is an insurance product. A surety bond is an agreement between three parties – the contractor, subcontractor and surety. The performance of the subcontractor is guaranteed by the surety. By contrast, SDI is an agreement between the contractor and insurer.
Rather than providing a guarantee of performance or payment, the insurer commits to reimbursing the contractor for costs relating to default of a subcontractor or supplier. This is usually a high-deductible dollar amount, which means that the contractor must absorb some costs in rectifying the default, but the exact amount is negotiable.
The insurer can also replace the performance bonds of subcontractors by providing the contractor with additional cover against default losses. However, it does not act as a substitute for a payment bond, meaning that if the contractor defaults on payment to the subcontractor or becomes insolvent, the subcontractor is not covered by the policy.
SDI can be advantageous over a normal default process by avoiding litigation and delays that can impact on the project schedule.
[edit] Related articles on Designing Buildings Wiki
- Advance payment bond.
- Bonds.
- Contractors’ all-risk insurance.
- Contract works insurance.
- Insurance.
- Legal indemnities.
- Liens.
- Mechanic’s lien.
- Performance bond.
- Retainage.
- Sub-contractor.
- Surety.
- Warranty.
[edit] External references
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
New and updated CLC building safety guidance.
New UK National Buildings Database.
Building Safety Wiki Interviews
Chief executive of the British Woodworking Federation.
Planning condition discharge in England and Wales
A brief explanation from a building compliance expert, with further links.
Overheating guidance and tools for building designers
Guidance for dealing with element of building fabric control that have increasing importance.
Shading for housing, a design guide
From the Good Homes Alliance and British Blind and Shutter Association.
UK Standard Skills Classification (SSC)
A shared framework for describing skills needs.
Social media ban consultation comes to close
CIOB urges UK Government to consider social media’s role in careers guidance in ban debate.
The latest of eight Skills England apprenticeship units
The addition of battery manufacturing welcomed by ECA with a warning about the risks of fast-tracked apprenticeship units.
Building Control Independent Panel final report
A precis of a key report led by Dame Hackitt with full recommendations and link to the government response.
Building Safety recap April, 2026
A short and longer run-through of the month, with links to further information and sources.
















