OBJECTIVES: Syncope that remains unexplained after a conventional evaluation is a common and vexing medical problem. Implantable loop recorder (ILR) is a new diagnostic method in diagnosis of recurrent syncope with unexplained etiology (NO). The aim of this analysis was to estimate the impact of ILR reimbursement in NO diagnostics on budget of public payer’s in Poland. METHODS: The analysis was performed in 5-year time horizon from the public payer’s perspective. Information regarding target population and medical resources was extracted from literature and registry PL‑US. Data in the registry PL-US were collected during 2006-2008 in 18 Polish centers. Cost data were obtained from the National Health Fund. In the analysis two scenarios were compared: actual (current situation with ILR reimbursement only in special cases) and prognostic (after ILR reimbursement). In the prognostic scenario two financing options of monitoring of patients after ILR implantation were distinguished – AOS and KAOS. One-way sensitivity analysis were performed for the key input parameters. RESULTS:   The number of target population for ILR implantation in Poland is stable, approximately 2370 patients. In actual scenario estimated annual public payer expenditure for NO diagnostics in each year 2010‑2014 is approximately 9.00 mPLN, where cost of ILR is 0.25 mPLN. Assuming reimbursement of ILR estimated public payer expenditure for NO diagnostics in option AOS is 9.77 mPLN in year 2010 and 16.76 mPLN in year 2014, where ILR costs is 1.44 mPLN and 11.34 mPLN, respectively. In option KAOS public payer expenditure is 9.86 mPLN in year 2010 and 18.49 mPLN in year 2014, where ILR costs is 1.53 mPLN and 13.07 mPLN, respectively. CONCLUSIONS:   Our findings suggest that decision concerning ILR reimbursement should not lead to increase total expenses on the NO diagnostics for public payer more than 0.95 mPLN in year 2010 and 10.00 mPLN in year 2014.