Pre-filled with the HK$4200/day API / Integration Engineer benchmark rate in Hong Kong. Adjust to your actual rate to convert it to an equivalent salary.
2026 API / Integration Engineer rates in Hong Kong, worked through as a sole proprietor over 220 billable days, with no expenses or pension.
| Rate | Billed / year | Take-home / year | Per month |
|---|---|---|---|
| HK$2,800/dayJunior | HK$616,000 | HK$538,990HK$44,916/mo | HK$44,916 |
| HK$4,200/dayMid-level | HK$924,000 | HK$794,630HK$66,219/mo | HK$66,219 |
| HK$6,400/daySenior | HK$1,408,000 | HK$1,196,350HK$99,696/mo | HK$99,696 |
| HK$8,800/dayPrincipal/Lead | HK$1,936,000 | HK$1,634,590HK$136,216/mo | HK$136,216 |
At the median HK$4,200/day, an API / Integration Engineer contractor working as a sole proprietor takes home about HK$794,630 a year, 86% of the HK$924,000 billed over 220 billable days.
A permanent API / Integration Engineer on the HK$54K median takes home HK$565,550, so contracting at the median rate leaves HK$229,080 more a year before unpaid holidays, pension, and gaps between contracts. On take-home alone, contracting draws level with that salary at about HK$2,945/day.
Pre-filled with the API / Integration Engineer median HK$4200/day benchmark. Adjust for your actual rate.
Contractor structure
An agency or umbrella treats you like an employee for Salaries Tax and MPF purposes, deducting both the normal 5% employee MPF and Salaries Tax before you're paid.
Equivalent permanent salary
HK$878,182
A HK$4,200/day rate at 230 billable days with a 10% loading is worth roughly the same as a HK$878,182 permanent base salary.
Annual gross contract income
HK$966,000
Equivalent base salary
HK$878,182
A modelling tool, not a quote. The contractor loading is a market rule of thumb (8%-15% PAYG/agency, 15%-25% sole proprietor) for unpaid leave, lack of job security and business admin; actual rates depend on skills demand, contract length and negotiating leverage. Hong Kong has no compulsory employer-side cost beyond 5% MPF (capped at HK$1,500/month) this MVP passes through to contractor pricing (see lib/hk-contractor-calculator.ts for the full Salaries Tax/MPF treatment by structure). Not personalised financial or tax advice. For take-home after Salaries Tax and MPF, see the Hong Kong Take-Home Calculator.
Multiply the day rate by your expected billable days (230 is a common default, accounting for Hong Kong's 12 statutory holidays, a paid-leave-equivalent buffer, and unpaid downtime between contracts), then adjust for the contractor loading you're charging on top of an equivalent salary. The calculator above does this both ways: salary to day rate, or day rate back to an equivalent salary.
It depends on your structure. PAYG/agency contractors, where the agency runs payroll and MPF like an employer, typically load 8-15% on top of an equivalent salary rate since the loading mainly covers unpaid leave. Sole proprietors, who invoice clients directly and self-fund their own mandatory MPF, typically load 15-25%.
It depends on your structure. A PAYG/agency contractor has MPF deducted the normal employee way (5%, capped at HK$1,500/month), matched by an employer contribution. A sole proprietor is legally required to enrol in MPF too, but contributes the full 5% themselves with no employer match. Always confirm your structure before comparing a quoted rate to a permanent salary.
A PAYG/agency contractor is taxed exactly like an employee under Salaries Tax. A true sole proprietor is technically assessed under Hong Kong's separate Profits Tax regime (a two-tiered 7.5%/15% rate on assessable business profits), which this calculator approximates using the same Salaries Tax mechanism as a simplification: see the day rate calculator's disclaimer for details.
At HK$4200/day over 220 billable days, the gross annual contract income is HK$924K. This is a 43% gross premium over the API / Integration Engineer permanent salary median of HK$54K/mo. The premium compensates contractors for self-funded MPF, leave, job security, and business admin that a permanent employer covers on an employee's behalf.
At the median HK$4,200/day, an API / Integration Engineer contractor working as a sole proprietor takes home about HK$794,630 a year, 86% of the HK$924,000 billed over 220 billable days. A permanent API / Integration Engineer on the HK$54K median takes home HK$565,550, so contracting at the median rate leaves HK$229,080 more a year before unpaid holidays, pension, and gaps between contracts. On take-home alone, contracting draws level with that salary at about HK$2,945/day.
API / Integration Engineer Day Rate Benchmarks
Full range, city breakdown, confidence
API / Integration Engineer Permanent Salary
Salary benchmarks and take-home comparison