Testing, Inspection & Certification
Your inspectors, auditors, and technical specialists work at client sites, labs, and project locations worldwide. Every deployment creates tax, immigration, and payroll obligations. A spreadsheet estimate built the week the proposal is due will miss most of them. Horizon models the full employer cost and surfaces the compliance exposure while the numbers still matter.
Cost simulation
Senior inspector · 6-month deployment
Germany
ReviewShort-term assignment
$148k
Total employer cost
Treaty days at 74 of 183
Brazil
ActionCommuter arrangement
$121k
Total employer cost
Work authorization required
Singapore
ClearLocal hire
$97k
Total employer cost
No withholding trigger
*Costs are modeled per destination from current statutory rates and your policy tiers.
Proposals go out with a margin assumption rather than a modeled cost. Employer social contributions, allowances, hypothetical tax, and destination payroll obligations land after the price is already committed.
Inspectors move between client sites, labs, and project locations across dozens of countries. 84% of mobility teams lack visibility into employee work locations. (Source: AI Inflection Point report)
A four-day site visit looks immaterial. Repeated across a year and a project team, those days cross treaty limits, trigger withholding, and create permanent establishment questions nobody totalled.
Growth through acquisition adds new entities, new destinations, and new deployment patterns. The cost and compliance assumptions that worked for the legacy business do not transfer.
Before
LegacyWith Horizon
ActiveBuild the complete employer cost of sending a technical specialist across borders: gross pay, employer social contributions, allowances, housing, travel, and tax. Powered by Horizon Cost Simulations.
Model the same deployment as a short-term assignment, a commuter arrangement, or a local hire, and see what each structure costs before you commit to one in a proposal.
Scale a single deployment model to the full team a contract requires, across every destination in scope, so the bid reflects the real staffing plan.
Rates and Taxes applies current statutory rates, social security logic, and treaty positions per destination, so the model does not depend on a lookup somebody saved last year.
Pre-Travel Assessments score each site visit for immigration, income tax, social security, and permanent establishment exposure before the traveler is booked.
The Policy Agent applies your published policy tiers to every model, so allowances and treatment are consistent across regions and proposal teams.
Define the role, destination, duration, and policy tier for the deployment you are pricing.
Horizon returns the full employer cost, broken down by component, with alternative structures side by side.
Tax, immigration, and permanent establishment exposure is flagged per destination before the price is committed.
Approved numbers and assumptions are versioned and shared with finance, tax, and delivery.
Ask what a deployment to a specific country costs, and what obligations it creates, and get an answer in seconds instead of waiting on an advisor email chain.
Model several deployment structures at once and compare total employer cost. 69% of mobility leaders say scenario modeling is a priority capability. (Source: AI Inflection Point report)
Your existing policy documents are parsed into structured rules, so allowances and tiers apply the same way across every model your teams build.
Immigration, withholding, and permanent establishment exposure is surfaced per destination as the model is built, not discovered at audit.
Where the cost comes from
Compliance flags by destination
Treaty day count approaching limit
Work permit required before mobilization
Screened, no obligations triggered
Non-resident withholding applies
One shared set of numbers
Finance, tax, and delivery price the bid from the same model.
A tender covers inspection work in six countries. Horizon models the employer cost per destination and role type, so the bid carries a defensible number rather than a blended guess.
A project runs eighteen months with staff rotating in and out. Horizon rolls up cumulative days per person, per country, and flags where a rotation pattern crosses a threshold.
Technical staff make dozens of short visits a year. Each is screened before booking, and the running day count stays current instead of being rebuilt at quarter end.
A newly acquired entity brings its own destinations and deployment patterns. Horizon models them on the same basis as the legacy business, so cost and exposure are comparable.
Finance and tax
Employer cost is modeled before it is committed, and withholding obligations are visible per destination rather than reconstructed after the fact.
Project and service delivery
Staffing plans can be costed as they are built, so the deployment structure chosen for a contract is the one that actually works commercially.
Mobility
Requests arrive with structured inputs and clear policy tiers, so the team spends its time on program design instead of assembling estimates by hand.
Risk and compliance
Immigration, treaty, and permanent establishment exposure is screened per deployment, with an auditable record of every assumption.
HR and talent
Scarce technical specialists get a deployment experience that works, and duty of care is evidenced per assignment rather than assumed.
190+
Countries covered by our cost, tax, and compliance logic
3,650+
Tax treaties supported, plus over 1,800 social security agreements
70+
Immigration law firms maintaining our global rules database
100+
Enterprise customers tracking work locations globally
Bring a live opportunity and we will model the full employer cost across your destinations and role types, and show the tax and immigration exposure it carries.
It means managing the tax, immigration, and payroll consequences of sending inspectors, auditors, and technical specialists to client sites, labs, and project locations in other countries. The work is short, frequent, and delivered on the client's premises, so the obligations look different from a traditional relocation program.
You need the full employer cost, not just salary: employer social contributions, allowances, housing and travel, hypothetical or actual tax, and any destination payroll obligations. Horizon Cost Simulations builds that model from structured inputs and current statutory rates, so the number is defensible in a client proposal.
Short visits accumulate. Cumulative days can cross treaty limits and local presence thresholds, trigger non-resident withholding, require work authorization, and contribute to permanent establishment risk for the entity. Pre-Travel Assessments screen each deployment before it is booked.
Yes. A single deployment model can be scaled to the full staffing plan a contract requires, across every destination in scope, so the bid reflects the real team rather than one representative assignment.
No. Horizon is built for staff who deploy, deliver, and move on. The focus is modeling deployment cost and compliance exposure for short and medium-term cross-border work, not managing household moves.
A walkthrough using your destinations, role types, and policy tiers, ideally against a bid you are pricing right now. See the full employer cost and the compliance exposure before the number goes to a client.
