How to Split Office Costs Fairly
Fair office cost splits come down to three components: desk space, common area, and conference rooms. Desk space is the most straightforward — each person pays for their private square footage at the per-sqft rate. Common area costs (kitchen, hallways, bathrooms, storage) get divided proportionally by days per week, since someone there 3 days uses those spaces 40% less than someone there 5 days. Conference room costs only hit the people who actually book meetings.
The formula: Monthly cost = (desk sqft × $/sqft) + (common area share × days adjustment) + (conference share × days adjustment). The days adjustment scales each component by attendance: 5 days/week = 100%, 3 days = 60%, 1 day = 20%.
Example: 4-Person Shared Office at $4,000/Month
A 1,200 sqft office at $4,000/month ($3.33/sqft) with 300 sqft of common area and a $200/month conference room allocation. Here is what each person pays:
| Person | Desk (sqft) | Days/Wk | Conf Room | Monthly |
|---|---|---|---|---|
| Alex | 120 | 5 | Yes | $1,250 |
| Jordan | 100 | 5 | Yes | $1,120 |
| Morgan | 80 | 3 | No | $570 |
| Riley | 60 | 2 | No | $310 |
Morgan pays 54% less than Alex despite being in the same office. That reflects reality: Morgan uses a smaller desk, shows up fewer days, and never books the conference room. Equal splits would have charged Morgan $1,000/month for $570 worth of office use.
Part-Time vs Full-Time Members
Equal splits are unfair when desk sizes differ. They become outright unreasonable when attendance differs too. A freelancer who comes in 2 days/week uses 60% less common area, 60% less electricity, and 60% less of every shared amenity compared to a full-timer. Charging both the same amount subsidizes the full-timer at the part-timer's expense.
This calculator applies a days-per-week adjustment to each cost component. If you attend 3 out of 5 days, your common area share is multiplied by 0.6. Your desk cost also gets prorated — you are not using your desk those 2 days, and if the space is a hot-desk setup, someone else might use it.
One exception: if you have a dedicated desk that nobody else uses when you are gone, some offices charge full desk rent regardless of attendance. In that case, you can set your days to 5 even if you only attend 3, and the desk cost stays at full rate while common area and conference costs still scale with your actual days.
Common Area Allocation Methods
There are three standard ways to split common area costs, and each has a use case:
- Equal split: Everyone pays the same share of common area. Works when all members attend roughly the same number of days and have similar desk sizes. Simplest to calculate, but penalizes part-timers.
- Proportional by days: Each person's common area share is weighted by their days per week. A 5-day member pays 2.5x what a 2-day member pays. This is the fairest for mixed-schedule offices and the method this calculator uses by default.
- Usage-based: Track actual kitchen use, printer pages, and meeting room hours. Most accurate but impractical for small offices. Larger coworking spaces like WeWork and Regus use sensors and card swipes to approximate this, but for a 3–5 person office, proportional by days is close enough.
For most shared offices with 2–8 people, proportional by days hits the sweet spot between fairness and simplicity. Nobody needs to install card readers to know who used the kitchen.
Shared Office Cost Benchmarks by City
Shared office costs vary dramatically by market. Here are 2026 benchmarks for dedicated desk space in major US cities, based on data from CoStar and commercial real estate listing aggregators:
| City | Hot Desk | Dedicated Desk | Private Office |
|---|---|---|---|
| New York (Manhattan) | $350–$600 | $500–$800 | $800–$1,500 |
| San Francisco | $300–$550 | $450–$700 | $700–$1,300 |
| Austin | $150–$300 | $250–$400 | $400–$700 |
| Denver | $175–$325 | $275–$450 | $450–$750 |
| Miami | $200–$375 | $300–$500 | $500–$900 |
| Chicago | $175–$350 | $300–$500 | $500–$850 |
These are per-person monthly rates for coworking spaces. If you are renting your own shared office directly (not through a coworking provider), expect to pay 20–40% less, but you take on lease liability, furniture costs, and internet/utility setup yourself. Use the calculator above with your actual lease cost for an exact breakdown.
For splitting just the rent portion of your shared space, try the rent split calculator. Need to divide utility bills on top of rent? The utility split calculator adjusts for work-from-home hours and room size. For splitting shared subscriptions like software licenses or cloud storage, see the subscription split calculator. If you need to allocate work tasks alongside costs, the workload split calculator handles capacity-weighted distribution. And for any uneven split scenario the uneven split calculator and square footage calculator can help you get the numbers right.