Enter Your Home Office Details
The page uses one main content column, while the form fields adapt to large, medium, and mobile screens.
Example Data Table
| Category | Sample Formula or Input | Sample Monthly Result |
|---|---|---|
| Allocated housing | $1,340 occupancy base × 15% | $201.00 |
| Allocated utilities | $205 utilities × 15% × 80% | $24.60 |
| Business internet | $60 × 70% | $42.00 |
| Direct office operations | Supplies + software + phone + repairs | $115.00 |
| Equipment amortization | $600 ÷ 36 months | $16.67 |
| Coworking cost | 4 days × $18 | $72.00 |
| Estimated monthly total | All categories added | $471.27 |
Formula Used
Office Share = Office Area ÷ Home Area
Allocated Housing = (Monthly Housing Cost + Property Tax / HOA + Insurance) × Office Share
Allocated Utilities = (Electricity + Water / Heating + Cleaning + Maintenance) × Office Share × Utilities Business Use %
Business Internet = Internet Cost × Internet Business Use %
Direct Office Operations = Office Supplies + Software + Phone + Direct Office Repairs
Equipment Amortization = Equipment Purchase Value ÷ Equipment Life in Months
Coworking Cost = Coworking Days per Month × Coworking Daily Cost
Estimated Monthly Cost = Allocated Housing + Allocated Utilities + Business Internet + Direct Office Operations + Equipment Amortization + Coworking Cost
Estimated Annual Cost = Estimated Monthly Cost × Working Months per Year
Estimated Tax Savings = Estimated Annual Cost × Estimated Tax Rate
Net Annual Cost = Estimated Annual Cost − Estimated Tax Savings
These equations are planning formulas for budgeting and pricing. They are not filing instructions.
How to Use This Calculator
- Enter the currency symbol you use for budgeting.
- Add monthly housing, tax, insurance, utility, and internet costs.
- Enter direct workspace spending such as supplies, software, phone, and repairs.
- Add one-time equipment value and choose a realistic useful life in months.
- Provide home area and dedicated office area to calculate workspace share.
- Set business-use percentages for utilities and internet.
- Optionally add coworking usage, tax rate, work days, and monthly revenue.
- Click the calculate button to show the results above the form, then use CSV or PDF export as needed.
Frequently Asked Questions
What does this calculator include?
It estimates shared housing allocation, utilities, internet, direct office expenses, amortized equipment, and optional coworking costs. It gives monthly, annual, workday, and tax-effect views for freelancers.
Does this calculator provide legal tax advice?
No. It gives a planning estimate only. Deduction rules vary by country, tax status, lease terms, and how your workspace is used. Always verify final filing treatment with a qualified tax professional.
Why do I enter both home area and office area?
Those values create the office-share percentage. That share helps allocate housing and utility costs to the workspace rather than applying your full household expense to business overhead.
Should I enter my full internet bill?
Yes. Then use the internet business-use percentage to estimate the portion that supports client work, communication, file transfers, meetings, and other freelance activity.
How are equipment purchases handled?
Large purchases are spread across useful-life months through amortization. This creates a steadier monthly overhead estimate instead of overstating cost in the purchase month.
Can I include coworking space costs too?
Yes. Enter the number of coworking days per month and the daily rate. The calculator adds that flexible workspace cost to your home office overhead.
What does cost ratio to revenue mean?
It compares monthly home office overhead to your monthly freelance revenue. A lower ratio usually means your pricing, workload, and cost structure are healthier.
Can employees use this calculator?
They can use it for budgeting, but some tax and reimbursement rules are different for employees. Freelancers, contractors, and self-employed workers usually benefit most from this version.