Filter Total Cost of Ownership
Why the cheapest filter often costs the most—and how to calculate what filtration really costs your operation.
Real Stories of "Cheap" Filters
Hydraulic System:
Switched to cheaper filters to save $30/unit. Six months later, servo valve failed from contamination. Cost: $8,000 valve + $12,000 labor + $30,000 lost production. The "savings" on 20 filters ($600) caused a $50,000+ loss.
Compressed Air System:
Budget coalescing filters let oil carryover reach paint booth. Entire production run rejected—$15,000 in scrap plus customer delay penalties.
HVAC System:
Low-cost MERV 8 filters clogged in 3 weeks instead of 3 months. Labor for 4x more changeouts plus increased energy from restricted airflow exceeded "savings" by 300%.
This happens every day in plants that buy filters on price alone.
What Is Filter TCO?
Total Cost of Ownership goes beyond the purchase price to include every cost associated with a filter over its lifetime. The filter itself is often the smallest part of the equation.
The TCO Equation
The 6 Components of Filter TCO
1. Purchase Cost
The sticker price. What most people focus on—but it's typically only 5-15% of total cost.
Annual filter purchases ÷ Annual operating hours = Cost per hour (purchase only)
2. Labor Cost
Someone has to change the filter. Include travel time to the machine, the actual change, cleanup, and documentation.
Typical filter change: 15-45 minutes
Loaded labor rate: $50-100/hour
Cost per change: $12-75
A filter that costs $20 more but lasts twice as long saves labor on every avoided change.
3. Downtime Cost
If the machine must stop for filter changes, that's lost production. This is often the largest cost component.
Example: CNC machine produces $500/hour in parts
30-minute filter change = $250 lost production
A $100 filter lasting 2000 hours vs. $60 filter lasting 1000 hours:
Cheap filter: 4 extra changes/year × $250 = $1,000 extra downtime
4. Disposal Cost
Used filters with oil are hazardous waste in many jurisdictions. Disposal isn't free.
Typical costs:
Oily filters: $0.50-2.00 per filter
Coolant filters: $1-5 per filter
Hazmat disposal: Can be much higher
5. Component Wear (The Hidden Killer)
Poor filtration accelerates wear on pumps, valves, cylinders, and bearings. This cost is invisible until something fails—then it's catastrophic.
Studies show:
Improving ISO cleanliness by one code level can double component life.
Going from 18/16/13 to 16/14/11 could extend a $5,000 pump's life from 5 years to 10 years.
Component replacement cost ÷ Life extension = Annual savings from better filtration
6. Inventory Carrying Cost
Filters on the shelf tie up capital, require storage space, and can degrade over time.
Rule of thumb: Carrying cost = 15-25% of inventory value per year
$10,000 in filter inventory = $1,500-2,500/year in carrying costs
TCO Comparison Examples
Example 1: Hydraulic Return Line Filter
Machine running 4,000 hours/year:
| Cost Factor | Budget Filter | Premium Filter |
|---|---|---|
| Purchase price | $45 | $85 |
| Average life | 800 hours | 2,000 hours |
| Changes per year | 5 | 2 |
| Annual filter cost | $225 | $170 |
| Labor per change ($60/hr × 0.5 hr) | $150 | $60 |
| Downtime per change ($200/hr × 0.5 hr) | $500 | $200 |
| Disposal ($1.50/filter) | $7.50 | $3 |
| Component wear impact* | $400 | $100 |
| Annual TCO | $1,282.50 | $533.00 |
Example 2: HVAC Panel Filters (20-Unit System)
Commercial building with 20 filter positions, changed quarterly:
| Cost Factor | MERV 8 Basic | MERV 11 Premium |
|---|---|---|
| Price per filter | $8 | $18 |
| Filter life | 6 weeks | 12 weeks |
| Changes per year (20 units) | 8 × 20 = 160 | 4 × 20 = 80 |
| Annual filter cost | $1,280 | $1,440 |
| Labor (8 vs 4 changeouts @ $150) | $1,200 | $600 |
| Energy (higher ΔP from clogging) | $2,400 | $1,800 |
| Coil cleaning (dirty filters = dirty coils) | $800 | $0 |
| Annual TCO | $5,680 | $3,840 |
Example 3: Compressed Air Coalescing Filter
100 CFM system running 2,000 hours/year:
| Cost Factor | Generic Element | OEM-Spec Element |
|---|---|---|
| Element price | $35 | $95 |
| Element life | 1,000 hours | 2,000 hours |
| Changes per year | 2 | 1 |
| Annual element cost | $70 | $95 |
| Pressure drop (energy @ $0.10/kWh) | $340 | $180 |
| Oil carryover risk (product contamination) | High | Low |
| Annual TCO (excluding contamination events) | $410+ | $275 |
*Component wear estimated based on cleanliness improvement and typical equipment life extension
The Pattern
Across hydraulic, HVAC, and compressed air systems, the same truth holds: filters that cost more per unit almost always cost less per year when you account for labor, energy, downtime, and downstream effects.
How to Calculate Your TCO
Gather your data
Filter prices, change frequency, labor rates, downtime costs, disposal fees. If you don't have exact numbers, estimate conservatively.
Calculate per-change costs
Labor + downtime + disposal = cost every time you change a filter (not including the filter itself).
Multiply by change frequency
A filter with longer life = fewer change events = lower per-change costs over the year.
Factor in filtration quality
Better filtration = cleaner fluid = longer component life. Even a conservative estimate can swing the TCO calculation dramatically.
Compare options
Run the same calculation for different filter brands/types. The winner is rarely the cheapest sticker price.
Quick TCO Wins
Extend filter life with breathers
Desiccant breathers prevent ingression, so system filters last longer. A $50 breather can double filter life.
Add offline filtration
A kidney loop polishes oil continuously, taking load off system filters and dramatically extending their life.
Filter new oil
New oil from the drum is NOT clean. Pre-filtering before adding to the system reduces load on system filters.
Right-size your filters
Undersized filters plug fast. Sometimes moving up one size doubles life for minimal cost increase.
Related Resources
Understanding these topics will help you optimize your filtration TCO:
Want help analyzing your filter TCO?
We can review your current filters and show where you're leaving money on the table.
