Women with early-stage breast cancer undergo breast-conserving surgery followed by irradiation to whole breast, resulting decrease in rate of local recurrence. Though adjuvant radiation therapy has survival and local control effects many have questioned with the associated toxicities and resulting mortality may actually nullify some of the survival benefit It is found that the mortality is specifically related to cardiac mortality, and studies have shown the cardiac mortality is more seen in patients who receive radiation therapy for left-sided breast Due to limited availability of data present study was planned to quantify the dose-sparing benefits of Right Deep Inspiration Breath Hold Technique (DIBH) compared to free breathing (FB) for right-sided breast radiotherapy Method: This was descriptive cross sectional study was carried out on secondary data of 40 patients of radiotherapy plans in FB and DIBH technique of forty patients who was originally receiving adjuvant radiotherapy to Right intact breast/chest wall with or without ipsilateral supraclavicular node and/or internal mammary node. Results: In present study out of 40 patients 25 patients had undergone Breast conservative surgery (BCS) and 15 undergone Modified radical mastectomy (MRM). For all cohorts there was significant ipsilateral lung sparing effect was seen in DIBH with Mean Lung = 0.72 ± 1.87 and V20Gy = 2.60 ± 6.45 showing statistically significance (p=0.02,p=0.015 respectively). There was significant dose sparing to contra lateral breast in DIBH for both the cohort i.e. BCS and MRM 0.10 ± 0.16 (p=0.00). Cardiac sparing effect was seen in DIBH for both BCS and MRM with Heart Mean dose 0.37 ± 0.96 (p=0.01) and Heart Max 1.52 ± 4.99 (p=0.06). In addition, a significant dose reduction in DIBH is seen in RCA Mean dose = 0.97 ± 1.84 (p=0.00) and RCA Max dose = 1.68 ± 2.68 (p=0.00). Conclusion: DIBH is a promising approach which could lead to sparing of normal-tissue during radiotherapy for right sided breast cancer patients, particularly sparing of heart and lungs.